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| |
| <li class="md-nav__item"> |
| <a href="../reconnection/" class="md-nav__link"> |
| |
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| |
| <span class="md-ellipsis"> |
| Reconnection |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../retries/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Retries |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../speculative_execution/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Speculative Execution |
| |
| </span> |
| |
| |
| </a> |
| </li> |
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| <li class="md-nav__item"> |
| <a href="../metrics/" class="md-nav__link"> |
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| |
| <span class="md-ellipsis"> |
| Metrics |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
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| <li class="md-nav__item md-nav__item--active"> |
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| <input class="md-nav__toggle md-toggle" type="checkbox" id="__toc"> |
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| <label class="md-nav__link md-nav__link--active" for="__toc"> |
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| |
| <span class="md-ellipsis"> |
| Logging |
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| </span> |
| |
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| <span class="md-nav__icon md-icon"></span> |
| </label> |
| |
| <a href="./" class="md-nav__link md-nav__link--active"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Logging |
| |
| </span> |
| |
| |
| </a> |
| |
| |
| |
| <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> |
| |
| |
| |
| |
| <label class="md-nav__title" for="__toc"> |
| <span class="md-nav__icon md-icon"></span> |
| Table of contents |
| </label> |
| <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix> |
| |
| <li class="md-nav__item"> |
| <a href="#logging" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| Logging |
| </span> |
| </a> |
| |
| <nav class="md-nav" aria-label="Logging"> |
| <ul class="md-nav__list"> |
| |
| <li class="md-nav__item"> |
| <a href="#quick-overview" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| Quick overview |
| </span> |
| </a> |
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| </li> |
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| <li class="md-nav__item"> |
| <a href="#setup" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| Setup |
| </span> |
| </a> |
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| </li> |
| |
| <li class="md-nav__item"> |
| <a href="#taxonomy-of-driver-logs" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| Taxonomy of driver logs |
| </span> |
| </a> |
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| <nav class="md-nav" aria-label="Taxonomy of driver logs"> |
| <ul class="md-nav__list"> |
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| <li class="md-nav__item"> |
| <a href="#error" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| ERROR |
| </span> |
| </a> |
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| </li> |
| |
| <li class="md-nav__item"> |
| <a href="#warn" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| WARN |
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| </li> |
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| <li class="md-nav__item"> |
| <a href="#info" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| INFO |
| </span> |
| </a> |
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| </li> |
| |
| <li class="md-nav__item"> |
| <a href="#debug-and-trace" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| DEBUG and TRACE |
| </span> |
| </a> |
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| </li> |
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| </ul> |
| </nav> |
| |
| </li> |
| |
| <li class="md-nav__item"> |
| <a href="#configuration-examples" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| Configuration examples |
| </span> |
| </a> |
| |
| <nav class="md-nav" aria-label="Configuration examples"> |
| <ul class="md-nav__list"> |
| |
| <li class="md-nav__item"> |
| <a href="#logback" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| Logback |
| </span> |
| </a> |
| |
| </li> |
| |
| <li class="md-nav__item"> |
| <a href="#log4j" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| Log4J |
| </span> |
| </a> |
| |
| </li> |
| |
| </ul> |
| </nav> |
| |
| </li> |
| |
| </ul> |
| </nav> |
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| </li> |
| |
| </ul> |
| |
| </nav> |
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| <li class="md-nav__item md-nav__item--nested"> |
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| <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_2_5_13" > |
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| <label class="md-nav__link" for="__nav_2_5_13" id="__nav_2_5_13_label" tabindex="0"> |
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| <span class="md-ellipsis"> |
| Statements |
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| </span> |
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| <span class="md-nav__icon md-icon"></span> |
| </label> |
| |
| <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_2_5_13_label" aria-expanded="false"> |
| <label class="md-nav__title" for="__nav_2_5_13"> |
| <span class="md-nav__icon md-icon"></span> |
| Statements |
| </label> |
| <ul class="md-nav__list" data-md-scrollfix> |
| |
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| <li class="md-nav__item"> |
| <a href="../statements/" class="md-nav__link"> |
| |
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| |
| <span class="md-ellipsis"> |
| Overview |
| |
| </span> |
| |
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| </a> |
| </li> |
| |
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| |
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| |
| <li class="md-nav__item"> |
| <a href="../statements/batch/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Batch |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../statements/per_query_keyspace/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Per Query Keyspace |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../statements/prepared/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Prepared |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../statements/simple/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Simple |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| </ul> |
| </nav> |
| |
| </li> |
| |
| |
| |
| |
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| |
| |
| |
| |
| <li class="md-nav__item"> |
| <a href="../paging/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Paging |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
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| |
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| |
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| |
| <li class="md-nav__item"> |
| <a href="../async/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Async Programming |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li class="md-nav__item"> |
| <a href="../reactive/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Reactive Streams |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li class="md-nav__item"> |
| <a href="../custom_codecs/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Custom Codecs |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../temporal_types/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Temporal Types |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
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| |
| <li class="md-nav__item"> |
| <a href="../tuples/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Tuples |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../udts/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| UDTs |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../compression/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Compression |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../address_resolution/" class="md-nav__link"> |
| |
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| |
| <span class="md-ellipsis"> |
| Address Resolution |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
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| |
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| |
| <li class="md-nav__item"> |
| <a href="../request_tracker/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Request Tracker |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
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| |
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| |
| <li class="md-nav__item"> |
| <a href="../throttling/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Throttling |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../tracing/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Tracing |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../performance/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Performance |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
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| <li class="md-nav__item md-nav__item--nested"> |
| |
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| |
| <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_2_5_27" > |
| |
| |
| <label class="md-nav__link" for="__nav_2_5_27" id="__nav_2_5_27_label" tabindex="0"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Metadata |
| |
| </span> |
| |
| |
| <span class="md-nav__icon md-icon"></span> |
| </label> |
| |
| <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_2_5_27_label" aria-expanded="false"> |
| <label class="md-nav__title" for="__nav_2_5_27"> |
| <span class="md-nav__icon md-icon"></span> |
| Metadata |
| </label> |
| <ul class="md-nav__list" data-md-scrollfix> |
| |
| |
| |
| |
| |
| |
| |
| <li class="md-nav__item"> |
| <a href="../metadata/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Overview |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li class="md-nav__item"> |
| <a href="../metadata/node/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Node |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../metadata/schema/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Schema |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../metadata/token/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Token |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| </ul> |
| </nav> |
| |
| </li> |
| |
| |
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| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../control_connection/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Control Connection |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../native_protocol/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Native Protocol |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
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| |
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| |
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| |
| <li class="md-nav__item"> |
| <a href="../non_blocking/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Non-blocking |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
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| <li class="md-nav__item"> |
| <a href="../query_timestamps/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Query Timestamps |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
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| <li class="md-nav__item"> |
| <a href="../idempotence/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Idempotence |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../detachable_types/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Detachable Types |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
| <li class="md-nav__item md-nav__item--nested"> |
| |
| |
| |
| <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_2_5_34" > |
| |
| |
| <label class="md-nav__link" for="__nav_2_5_34" id="__nav_2_5_34_label" tabindex="0"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| DSE |
| |
| </span> |
| |
| |
| <span class="md-nav__icon md-icon"></span> |
| </label> |
| |
| <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_2_5_34_label" aria-expanded="false"> |
| <label class="md-nav__title" for="__nav_2_5_34"> |
| <span class="md-nav__icon md-icon"></span> |
| DSE |
| </label> |
| <ul class="md-nav__list" data-md-scrollfix> |
| |
| |
| |
| |
| |
| |
| |
| <li class="md-nav__item"> |
| <a href="../dse/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Overview |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
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| |
| <li class="md-nav__item"> |
| <a href="../dse/geotypes/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Geotypes |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| |
| <li class="md-nav__item md-nav__item--nested"> |
| |
| |
| |
| <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_2_5_34_3" > |
| |
| |
| <label class="md-nav__link" for="__nav_2_5_34_3" id="__nav_2_5_34_3_label" tabindex="0"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Graph |
| |
| </span> |
| |
| |
| <span class="md-nav__icon md-icon"></span> |
| </label> |
| |
| <nav class="md-nav" data-md-level="4" aria-labelledby="__nav_2_5_34_3_label" aria-expanded="false"> |
| <label class="md-nav__title" for="__nav_2_5_34_3"> |
| <span class="md-nav__icon md-icon"></span> |
| Graph |
| </label> |
| <ul class="md-nav__list" data-md-scrollfix> |
| |
| |
| |
| |
| |
| |
| |
| <li class="md-nav__item"> |
| <a href="../dse/graph/" class="md-nav__link"> |
| |
| |
| |
| <span class="md-ellipsis"> |
| Overview |
| |
| </span> |
| |
| |
| </a> |
| </li> |
| |
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| <li class="md-nav__item md-nav__item--nested"> |
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| <h1>Logging</h1> |
| |
| <!-- |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
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| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| --> |
| |
| <h2 id="logging">Logging<a class="headerlink" href="#logging" title="Permanent link">¶</a></h2> |
| <h3 id="quick-overview">Quick overview<a class="headerlink" href="#quick-overview" title="Permanent link">¶</a></h3> |
| <ul> |
| <li>based on SLF4J.</li> |
| <li>config file examples for Logback and Log4J. </li> |
| </ul> |
| <p><strong>If you're looking for information about the request logger, see the <a href="../request_tracker/#request-logger">request |
| tracker</a> page.</strong></p> |
| <hr /> |
| <p>The driver uses <a href="https://www.slf4j.org/">SLF4J</a> as a logging facade. This allows you to plug in your preferred logging |
| framework (java.util.logging, logback, log4j...) at deployment time. </p> |
| <h3 id="setup">Setup<a class="headerlink" href="#setup" title="Permanent link">¶</a></h3> |
| <p>To connect SLF4J to your logging framework, add a <a href="https://www.slf4j.org/manual.html#swapping">binding</a> JAR in your classpath. If you use a |
| build tool such as Maven or Gradle, this usually involves adding a runtime dependency to your |
| application descriptor (<code>pom.xml</code> or <code>build.gradle</code>). For example, here is a Maven snippet for |
| <a href="http://logback.qos.ch">Logback</a>:</p> |
| <div class="highlight"><pre><span></span><code><span class="nt"><dependency></span> |
| <span class="w"> </span><span class="nt"><groupId></span>ch.qos.logback<span class="nt"></groupId></span> |
| <span class="w"> </span><span class="nt"><artifactId></span>logback-classic<span class="nt"></artifactId></span> |
| <span class="w"> </span><span class="nt"><version></span>...<span class="nt"></version></span> |
| <span class="nt"></dependency></span> |
| </code></pre></div> |
| <p>And the same for <a href="https://logging.apache.org/log4j">Log4J</a>:</p> |
| <div class="highlight"><pre><span></span><code><span class="nt"><dependency></span> |
| <span class="w"> </span><span class="nt"><groupId></span>org.slf4j<span class="nt"></groupId></span> |
| <span class="w"> </span><span class="nt"><artifactId></span>slf4j-log4j12<span class="nt"></artifactId></span> |
| <span class="w"> </span><span class="nt"><version></span>...<span class="nt"></version></span> |
| <span class="nt"></dependency></span> |
| </code></pre></div> |
| <p>Check <a href="http://www.slf4j.org/manual.html#projectDep">SLF4J's documentation</a> for examples for other |
| logging frameworks, and for troubleshooting dependency resolution problems.</p> |
| <p>Each logging framework has its own configuration rules, but all of them provide different levels |
| (DEBUG, INFO, WARN, ERROR...), different <em>loggers</em> or <em>categories</em> (messages from different |
| categories or loggers can be filtered out separately or printed out differently), and different |
| <em>appenders</em> (message receptacles such as the standard console, the error console, a file on disk, a |
| socket...).</p> |
| <p>Check your logging framework documentation for more information about how to properly configure it. |
| You can also find some configuration examples at the end of this page.</p> |
| <p>Performance tips:</p> |
| <ul> |
| <li>Use asynchronous appenders; both |
| <a href="http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/AsyncAppender.html">Log4J</a> and |
| <a href="http://logback.qos.ch/manual/appenders.html#AsyncAppender">Logback</a> provide asynchronous |
| appenders which reduce the impact of logging in latency-sensitive applications.</li> |
| <li>While the driver does not provide such capability, it is possible for client applications to |
| hot-reload the log configuration without stopping the application. This usually involves JMX and |
| is available for <a href="http://logback.qos.ch/manual/jmxConfig.html">Logback</a>; Log4J provides a |
| <code>configureAndWatch()</code> method but it is not recommended to use it inside J2EE containers (see |
| <a href="https://logging.apache.org/log4j/1.2/faq.html#a3.6">FAQ</a>).</li> |
| </ul> |
| <h3 id="taxonomy-of-driver-logs">Taxonomy of driver logs<a class="headerlink" href="#taxonomy-of-driver-logs" title="Permanent link">¶</a></h3> |
| <p>The driver has a well-defined use for each log level. As an application developer/administrator, you |
| should be focusing mostly on the <code>ERROR</code>, <code>WARN</code> and <code>INFO</code> levels.</p> |
| <h4 id="error">ERROR<a class="headerlink" href="#error" title="Permanent link">¶</a></h4> |
| <p>Something that renders the driver -- or a part of it -- completely unusable. An action is required |
| to fix it: bouncing the client, applying a patch, etc.</p> |
| <h4 id="warn">WARN<a class="headerlink" href="#warn" title="Permanent link">¶</a></h4> |
| <p>Something that the driver can recover from automatically, but indicates a configuration or |
| programming error that should be addressed. For example:</p> |
| <div class="highlight"><pre><span></span><code>WARN c.d.o.d.i.core.session.PoolManager - [s0] Detected a keyspace change at runtime (<none> => |
| test). This is an anti-pattern that should be avoided in production (see |
| 'request.warn-if-set-keyspace' in the configuration). |
| |
| WARN c.d.o.d.i.c.c.CqlPrepareHandlerBase - Re-preparing already prepared query. This is generally |
| an anti-pattern and will likely affect performance. The cached version of the PreparedStatement |
| will be returned, which may use different bound statement execution parameters (CL, timeout, etc.) |
| from the current session.prepare call. Consider preparing the statement only once. Query='...' |
| </code></pre></div> |
| <h4 id="info">INFO<a class="headerlink" href="#info" title="Permanent link">¶</a></h4> |
| <p>Something that is part of the normal operation of the driver, but might be useful to know for an |
| administrator. For example:</p> |
| <div class="highlight"><pre><span></span><code>INFO c.d.o.d.i.c.metadata.MetadataManager - [s0] No contact points provided, defaulting to |
| /127.0.0.1:9042 |
| |
| INFO c.d.o.d.internal.core.time.Clock - Using native clock for microsecond precision |
| |
| INFO c.d.o.d.i.c.c.t.DefaultDriverConfigLoader - [s0] Detected a configuration change |
| </code></pre></div> |
| <h4 id="debug-and-trace">DEBUG and TRACE<a class="headerlink" href="#debug-and-trace" title="Permanent link">¶</a></h4> |
| <p>These levels are intended primarily for driver developers; we might ask you to enable them to |
| investigate an issue.</p> |
| <p>Keep in mind that they are quite verbose, in particular TRACE. It's a good idea to only enable them |
| on a limited set of categories.</p> |
| <h3 id="configuration-examples">Configuration examples<a class="headerlink" href="#configuration-examples" title="Permanent link">¶</a></h3> |
| <h4 id="logback">Logback<a class="headerlink" href="#logback" title="Permanent link">¶</a></h4> |
| <p>Here is a sample configuration file for Logback.</p> |
| <p>It logs driver messages of level INFO and above, and all other libraries at level ERROR only.</p> |
| <p>The appenders send all messages of level INFO and above to the console, and all messages to a |
| rolling file (with the current configuration, the console and log file have the same contents, but |
| if you were to enable DEBUG logs for a category, those logs would go to the file but not the |
| console).</p> |
| <div class="highlight"><pre><span></span><code><span class="cp"><?xml version="1.0" encoding="UTF-8"?></span> |
| <span class="nt"><configuration></span> |
| |
| <span class="w"> </span><span class="cm"><!-- log INFO or higher messages to the console --></span> |
| <span class="w"> </span><span class="nt"><appender</span><span class="w"> </span><span class="na">name=</span><span class="s">"console"</span><span class="w"> </span><span class="na">class=</span><span class="s">"ch.qos.logback.core.ConsoleAppender"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><encoder></span> |
| <span class="w"> </span><span class="nt"><pattern></span>%-5p<span class="w"> </span>%msg%n<span class="nt"></pattern></span> |
| <span class="w"> </span><span class="nt"></encoder></span> |
| <span class="w"> </span><span class="nt"></appender></span> |
| |
| <span class="w"> </span><span class="cm"><!-- log everything to a rolling file --></span> |
| <span class="w"> </span><span class="nt"><appender</span><span class="w"> </span><span class="na">name=</span><span class="s">"file"</span><span class="w"> </span><span class="na">class=</span><span class="s">"ch.qos.logback.core.rolling.RollingFileAppender"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><file></span>driver.log<span class="nt"></file></span> |
| <span class="w"> </span><span class="nt"><encoder></span> |
| <span class="w"> </span><span class="nt"><pattern></span>%-5p<span class="w"> </span>[%d{ISO8601}]<span class="w"> </span>[%t]<span class="w"> </span>%F:%L<span class="w"> </span>-<span class="w"> </span>%msg%n<span class="nt"></pattern></span> |
| <span class="w"> </span><span class="nt"></encoder></span> |
| <span class="w"> </span><span class="nt"><rollingPolicy</span><span class="w"> </span><span class="na">class=</span><span class="s">"ch.qos.logback.core.rolling.TimeBasedRollingPolicy"</span><span class="nt">></span> |
| <span class="w"> </span><span class="cm"><!-- daily rollover --></span> |
| <span class="w"> </span><span class="nt"><fileNamePattern></span>driver.%d{yyyy-MM-dd}.log<span class="nt"></fileNamePattern></span> |
| <span class="w"> </span><span class="cm"><!-- keep 30 days' worth of history --></span> |
| <span class="w"> </span><span class="nt"><maxHistory></span>30<span class="nt"></maxHistory></span> |
| <span class="w"> </span><span class="nt"></rollingPolicy></span> |
| <span class="w"> </span><span class="nt"></appender></span> |
| |
| <span class="w"> </span><span class="cm"><!-- use AsyncAppender for lower latencies --></span> |
| <span class="w"> </span><span class="nt"><appender</span><span class="w"> </span><span class="na">name=</span><span class="s">"async"</span><span class="w"> </span><span class="na">class=</span><span class="s">"ch.qos.logback.classic.AsyncAppender"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><appender-ref</span><span class="w"> </span><span class="na">ref=</span><span class="s">"console"</span><span class="w"> </span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><appender-ref</span><span class="w"> </span><span class="na">ref=</span><span class="s">"file"</span><span class="w"> </span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"></appender></span> |
| |
| <span class="w"> </span><span class="nt"><root</span><span class="w"> </span><span class="na">level=</span><span class="s">"ERROR"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><appender-ref</span><span class="w"> </span><span class="na">ref=</span><span class="s">"async"</span><span class="w"> </span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"></root></span> |
| <span class="w"> </span><span class="nt"><logger</span><span class="w"> </span><span class="na">name=</span><span class="s">"com.datastax.oss.driver"</span><span class="w"> </span><span class="na">level=</span><span class="w"> </span><span class="s">"INFO"</span><span class="nt">/></span> |
| <span class="nt"></configuration></span> |
| </code></pre></div> |
| <h4 id="log4j">Log4J<a class="headerlink" href="#log4j" title="Permanent link">¶</a></h4> |
| <p>Here is a sample configuration file for Log4J.</p> |
| <p>It logs driver messages of level INFO and above, and all other libraries at level ERROR only.</p> |
| <p>The appenders send all messages of level INFO and above to the console, and all messages to a |
| rolling file (with the current configuration, the console and log file have the same contents, but |
| if you were to enable DEBUG logs for a category, those logs would go to the file but not the |
| console).</p> |
| <div class="highlight"><pre><span></span><code><span class="nt"><log4j:configuration></span> |
| |
| <span class="w"> </span><span class="cm"><!-- log INFO or higher messages to the console --></span> |
| <span class="w"> </span><span class="nt"><appender</span><span class="w"> </span><span class="na">name=</span><span class="s">"console"</span><span class="w"> </span><span class="na">class=</span><span class="s">"org.apache.log4j.ConsoleAppender"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><param</span><span class="w"> </span><span class="na">name=</span><span class="s">"threshold"</span><span class="w"> </span><span class="na">value=</span><span class="s">"INFO"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><layout</span><span class="w"> </span><span class="na">class=</span><span class="s">"org.apache.log4j.PatternLayout"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><param</span><span class="w"> </span><span class="na">name=</span><span class="s">"ConversionPattern"</span><span class="w"> </span><span class="na">value=</span><span class="s">"%-5p %m%n"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"></layout></span> |
| <span class="w"> </span><span class="nt"></appender></span> |
| |
| <span class="w"> </span><span class="cm"><!-- log everything to a rolling file --></span> |
| <span class="w"> </span><span class="nt"><appender</span><span class="w"> </span><span class="na">name=</span><span class="s">"file"</span><span class="w"> </span><span class="na">class=</span><span class="s">"org.apache.log4j.RollingFileAppender"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><param</span><span class="w"> </span><span class="na">name=</span><span class="s">"file"</span><span class="w"> </span><span class="na">value=</span><span class="s">"driver.log"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><param</span><span class="w"> </span><span class="na">name=</span><span class="s">"append"</span><span class="w"> </span><span class="na">value=</span><span class="s">"false"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><param</span><span class="w"> </span><span class="na">name=</span><span class="s">"maxFileSize"</span><span class="w"> </span><span class="na">value=</span><span class="s">"1GB"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><param</span><span class="w"> </span><span class="na">name=</span><span class="s">"maxBackupIndex"</span><span class="w"> </span><span class="na">value=</span><span class="s">"10"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><layout</span><span class="w"> </span><span class="na">class=</span><span class="s">"org.apache.log4j.PatternLayout"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><param</span><span class="w"> </span><span class="na">name=</span><span class="s">"ConversionPattern"</span><span class="w"> </span><span class="na">value=</span><span class="s">"%-5p [%d{ISO8601}] [%t] %F:%L - %m%n"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"></layout></span> |
| <span class="w"> </span><span class="nt"></appender></span> |
| |
| <span class="w"> </span><span class="cm"><!-- use AsyncAppender for lower latencies --></span> |
| <span class="w"> </span><span class="nt"><appender</span><span class="w"> </span><span class="na">name=</span><span class="s">"async"</span><span class="w"> </span><span class="na">class=</span><span class="s">"org.apache.log4j.AsyncAppender"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><param</span><span class="w"> </span><span class="na">name=</span><span class="s">"BufferSize"</span><span class="w"> </span><span class="na">value=</span><span class="s">"500"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><appender-ref</span><span class="w"> </span><span class="na">ref=</span><span class="s">"file"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><appender-ref</span><span class="w"> </span><span class="na">ref=</span><span class="s">"console"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"></appender></span> |
| |
| <span class="w"> </span><span class="nt"><root></span> |
| <span class="w"> </span><span class="nt"><priority</span><span class="w"> </span><span class="na">value=</span><span class="s">"ERROR"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"><appender-ref</span><span class="w"> </span><span class="na">ref=</span><span class="s">"async"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"></root></span> |
| <span class="w"> </span><span class="nt"><logger</span><span class="w"> </span><span class="na">name=</span><span class="s">"com.datastax.oss.driver"</span><span class="nt">></span> |
| <span class="w"> </span><span class="nt"><level</span><span class="w"> </span><span class="na">value=</span><span class="s">"INFO"</span><span class="nt">/></span> |
| <span class="w"> </span><span class="nt"></logger></span> |
| |
| <span class="nt"></log4j:configuration></span> |
| </code></pre></div> |
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