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         <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-2.1.0
 </code></pre></div></div>

 <h2 id="bug">Bug</h2>
 <ul>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2400">SCB-2400</a> - Govern api return empty schemaIds</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2403">SCB-2403</a> - Start up failed when upgrade sc version</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2404">SCB-2404</a> - Return internal properties when list all microservices</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2411">SCB-2411</a> - Try dlock before start retirement job</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2418">SCB-2418</a> - Fix etcd metrics not correct</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2420">SCB-2420</a> - Can not delete unused role
     <h2 id="new-feature">New Feature</h2>
   </li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2402">SCB-2402</a> - Support synchronization of multiple registries</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2401">SCB-2401</a> - Append inner properties when heartbeat success</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2408">SCB-2408</a> - Add put instance service</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2409">SCB-2409</a> - Add resource usage service</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2412">SCB-2412</a> - Add dlock service</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2414">SCB-2414</a> - Add schema retire cron job</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2415">SCB-2415</a> - Add schema ref</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2419">SCB-2419</a> - Add govern service
     <h2 id="improvement">Improvement</h2>
   </li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2405">SCB-2405</a> - Use dlock instead</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2406">SCB-2406</a> - Using cari’s mongo db client</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2407">SCB-2407</a> - Using cari db client</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2410">SCB-2410</a> - Refactoring disco service</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2413">SCB-2413</a> - Refactoring RBAC datasource interface</li>
   <li><a href="https://issues.apache.org/jira/browse/SCB-2416">SCB-2416</a> - Refactoring quota mgr</li>
   <li>
     <p><a href="https://issues.apache.org/jira/browse/SCB-2417">SCB-2417</a> - Refactoring schema service</p>

     <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  Release Notes - Apache ServiceComb - Version service-center-2.0.0
 </code></pre></div>    </div>
   </li>
 </ul>

 <p></p>
 <h2>        Bug
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-2259">SCB-2259</a>] -         gopool can not reuse worker with certainty
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-2176">SCB-2176</a>] -         SD Cache is not consistency
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1720">SCB-1720</a>] -         Service-center consumes huge CPU when it is disconnected from etcd
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1069">SCB-1069</a>] -         Wrong response of batch delete microservices API
 </li>
 </ul>

 <p></p>
 <h2>        New Feature
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-2133">SCB-2133</a>] -         governance northbound Interface / abstract access layer
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-2094">SCB-2094</a>] -         New datasource architecture
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-2093">SCB-2093</a>] -         Supplement the role module of rbac
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-952">SCB-952</a>] -         Support sync ServiceComb service to Kubernetes
 </li>
 </ul>

 <h2>        Improvement
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-624">SCB-624</a>] -         Abstract service layer between api and cache
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-489">SCB-489</a>] -         Suggest to add Service Center user guide and development guide to the ServiceComb official website
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-438">SCB-438</a>] -         As SC model is changing, we should keep SC proto spec in isolated project, so that go sdk can import same model as SC does
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-2022">SCB-2022</a>] -         Migrate service-center documents to sphinx
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1712">SCB-1712</a>] -         Reset the etcd cache periodically
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1545">SCB-1545</a>] -         add support env config for logfilepath and logfile level
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1042">SCB-1042</a>] -         Support upload SC schemas
 </li>
 </ul>

 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.3.0
 </code></pre></div></div>

 <h2>        Sub-task
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1296">SCB-1296</a>] -         [Syncer] Store Syncer data to etcd
 </li>
 </ul>

 <h2>        New Feature
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1295">SCB-1295</a>] -         Syncer for synchronize data between multiple service centers
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1301">SCB-1301</a>] -         [Syncer] Syncer reliability improvement, support for etcd cluster management
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1302">SCB-1302</a>] -         [Syncer]Refactor data strcture of storage module to support springcloud Eureka.
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1307">SCB-1307</a>] -         Store Syncer data to etcd
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1453">SCB-1453</a>] -         [Syncer] New servicecenter plugin supported eureka
 </li>
 </ul>

 <h2>        Improvement
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1427">SCB-1427</a>] -         Move storage to syncer/servicecenter
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1429">SCB-1429</a>] -         Use etcd operation
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1441">SCB-1441</a>] -         [Syncer] Support for using tls certificate in Syner
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1464">SCB-1464</a>] -         [Syncer] The architecture picture needs to be updated, after adding support for eureka
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1465">SCB-1465</a>] -         [Syncer] Command line parameter error in Quick Start
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1491">SCB-1491</a>] -         [Syncer] Example of instance access between multiple service-centers
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1498">SCB-1498</a>] -         Allow schema modification of services in production environment
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1512">SCB-1512</a>] -         Allow custom handler chain
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1539">SCB-1539</a>] -         Add command line to support output syncer version
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1540">SCB-1540</a>] -         Add syncer&#39;s packaging command to the script of release
 </li>
 </ul>
 <p></p>

 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.2.0
 </code></pre></div></div>

 <h2>        Bug
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1050">SCB-1050</a>] -         Metrics cache does not clean
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Unexpected events publish if error occurs in previous list-watch loop
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Re-register instance does not keep alive the lease
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Use the raw password if decrypt failed
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Should not show the shared microservices by default
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Add grpc keepalive time
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1069">SCB-1069</a>] -         Wrong response of batch delete microservices API
 </li>
 </ul>

 <h2>        New Feature
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1049">SCB-1049</a>] -         Alarm center
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1087">SCB-1087</a>] -         Add View Schema Option in Schema Details Page
 </li>
 </ul>

 <h2>        Improvement
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1052">SCB-1052</a>] -         import zap logger without binding go version
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1053">SCB-1053</a>] -         Batch microservices instances discovery API
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1070">SCB-1070</a>] -         New instance &#39;TESTING&#39; status
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1092">SCB-1092</a>] -         More abundant metrics information
 </li>
 </ul>

 <h2>        Task
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1219">SCB-1219</a>] -         Prepare 1.2.0 Release
 </li>
 </ul>

 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.1.0
 </code></pre></div></div>

 <h2>        Bug
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-744">SCB-744</a>] -         Wrong error code returned in Find API
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-851">SCB-851</a>] -         Can not get providers if consumer have * dependency rule
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-857">SCB-857</a>] -         Provider rule of consumer can not be removed
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-863">SCB-863</a>] -         build script for docker image gives an error
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-890">SCB-890</a>] -         Lost changed event when bootstrap with embedded etcd
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-912">SCB-912</a>] -         rest client still verify peer host when verifyPeer flag set false
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-924">SCB-924</a>] -         Etcd cacher should re-list etcd in fixed time interval
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-927">SCB-927</a>] -         The latest Lager is not compatible
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-929">SCB-929</a>] -         Concurrent error in update resource APIs
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-930">SCB-930</a>] -         Service Center Frontend stops responding in Schema test if Schema has &#39;\&quot;&#39; character in the description
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-934">SCB-934</a>] -         Get all dependency rules will panic
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-938">SCB-938</a>] -         Should check self presevation max ttl
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-951">SCB-951</a>] -         Wrong help information in scctl
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-958">SCB-958</a>] -         The instance delete event delay more than 2s
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-977">SCB-977</a>] -         Dependencies will not be updated in 5min when micro service is changed
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-980">SCB-980</a>] -         The dependency will be broken when commit etcd failed
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-981">SCB-981</a>] -         Can not remove the microservice and instance properties
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-991">SCB-991</a>] -         Optimize args parsing
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-993">SCB-993</a>] -         Bug fixes
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-994">SCB-994</a>] -         SC can not read the context when client using grpc api
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1027">SCB-1027</a>] -         Fix the core dump in SC which compiled with go1.10+
 </li>
 </ul>

 <h2>        New Feature
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-815">SCB-815</a>] -         Support deploy in Kubernetes
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-850">SCB-850</a>] -         Support discover instances from kubernetes cluster
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-869">SCB-869</a>] -         SC cli tool
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-902">SCB-902</a>] -         Support service discovery by Service Mesh
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-914">SCB-914</a>] -         Support using scctl to download schemas
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-941">SCB-941</a>] -         Support multiple datacenter deployment
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-949">SCB-949</a>] -         Support access distinct kubernetes clusters
 </li>
 </ul>

 <h2>        Improvement
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-418">SCB-418</a>] -         How to deploy a SC cluster in container environment
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-435">SCB-435</a>] -         Add plugin document in ServiceCenter
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-792">SCB-792</a>] -         More abundant metrics information
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-796">SCB-796</a>] -         Update the paas-lager package
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-797">SCB-797</a>] -         More information in dump API
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-807">SCB-807</a>] -         Limit the topology view to only 100 microservices.
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-808">SCB-808</a>] -         Aut-refresh the dashboard and service-list page every 10sec
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-809">SCB-809</a>] -         Verify the chinese version of the UI as all chinese text was translated using Google Translate
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-816">SCB-816</a>] -         Update the protobuf version to 1.0.0
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-840">SCB-840</a>] -         Support configable limit in buildin quota plugin
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-844">SCB-844</a>] -         Update golang version to 1.9.2
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-848">SCB-848</a>] -         Uses zap to replace the paas-lager
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-862">SCB-862</a>] -         Using different environment variables in image
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-892">SCB-892</a>] -         output plugins configs in version api
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-899">SCB-899</a>] -         Support go1.11 module maintaining
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-901">SCB-901</a>] -         Making service registration api idempotent
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-937">SCB-937</a>] -         Customizable tracing sample rate
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-953">SCB-953</a>] -         Support sync distinct Kubernetes service types to service-center
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-978">SCB-978</a>] -         Fix translation issues for Chinese Locale on First Load
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-983">SCB-983</a>] -         Output the QPS per domain
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-984">SCB-984</a>] -         Add Health Check command
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1015">SCB-1015</a>] -         Support the forth microservice version number registration
 </li>
 </ul>

 <h2>        Task
 </h2>
 <ul>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-720">SCB-720</a>] -         Show the instance statistics in Dashboard and Instance List in Side Menu
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-973">SCB-973</a>] -         TLP graduation tasks
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1016">SCB-1016</a>] -         Change git repo name
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1028">SCB-1028</a>] -         Prepare 1.1.0 Service-Center Release
 </li>
 <li>[<a href="https://issues.apache.org/jira/browse/SCB-1033">SCB-1033</a>] -         Update license for Service-Center
 </li>
 </ul>

 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0
 </code></pre></div></div>

 <h4 id="new-featuresimprovements">New Features/Improvements:</h4>
 <ul>
   <li>Make ETCD connection more Resilient</li>
   <li>Make ETCD request timeout configurable</li>
   <li>Support TLS Plugin</li>
   <li>Optimize Governance API for Searching Schema</li>
   <li>Optimize Find Instance API</li>
   <li>Use glide for dependency management</li>
   <li>Add release binaries for MacOS</li>
   <li>Add Toplogy View and Instance View in UI</li>
 </ul>

 <h4 id="bug-fix">Bug-Fix:</h4>
 <ul>
   <li>Fix connection leak in etcd</li>
   <li>Fix Lose of events in some scenarios</li>
   <li>Fix Cache mismatch.</li>
 </ul>

 <h6 id="for-more-details-please-click-here">For more details please <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12321626&amp;version=12342427">click here</a></h6>

 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0-m2
 </code></pre></div></div>

 <h4 id="api-changes-">API Changes :</h4>
 <ul>
   <li>Governance API also returns self microservice information.</li>
   <li>Governance API should not show the shared microservices information.</li>
   <li>Support batch delete in registry.</li>
   <li>Change the type of force query parameter to bool in delete api.</li>
 </ul>

 <h4 id="new-featuresimprovements-1">New Features/Improvements:</h4>
 <ul>
   <li>Support Async Rest Template.</li>
   <li>Support of Testing Schema from frontend.</li>
   <li>Support log rotation.</li>
   <li>Support ipv6.</li>
   <li>Static data return instanceCount by domain.</li>
   <li>Convenient store extension.</li>
   <li>Retry the connection to etcd in-case of failure.</li>
   <li>Show proper error details in frontend.</li>
   <li>Support Default TLS Cipher Suites.</li>
   <li>Proxy Frontend request to Service-Center.</li>
   <li>Use bower to resolve the dependency of frontend.</li>
   <li>Add registry server HC mechanism.</li>
 </ul>

 <h4 id="bug-fix-1">Bug-Fix:</h4>
 <ul>
   <li>Fix issue of filter instance using service-tags.</li>
   <li>Fix re-creation of tracing file.</li>
   <li>Fix SC cannot check duplicate endpoints when registered with etcd.</li>
   <li>Fix wrong parentId in tracing data.</li>
   <li>Fix wrong log print in update Instance.</li>
   <li>Fix null pointer reference in zipkin plugin.</li>
   <li>Fix delete service should delete dependency key.</li>
   <li>Fix cache does not match with etcd store.</li>
   <li>Fix remove the backup log files which are expired.</li>
   <li>Fix typos in response of schema api’s.</li>
   <li>Fix incorrect metric label value.</li>
   <li>Fix register instance withe same id will create redundant endpoints.</li>
 </ul>

 <h6 id="for-more-details-please-click-here-1">For more details please <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12321626&amp;version=12342354">click here</a></h6>

 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0-m1
 </code></pre></div></div>

 <h4 id="api-changes--1">API Changes :</h4>
 <ul>
   <li>Added new API to get All Schema List.</li>
   <li>Add Service statistics in the Governance API.</li>
   <li>Add Self-microservice information in the Governance API.</li>
 </ul>

 <h4 id="new-featuresimprovements-2">New Features/Improvements:</h4>
 <ul>
   <li>Support discovery of SC instances by Consumer micro-service.</li>
   <li>Event driven implementation for dependency rules.</li>
   <li>Make compact interval configurable and avoid defragmentation of the database when compacted.</li>
   <li>Update the default quota’s limit of service/instance count.</li>
   <li>Update black-list rule controls in discovery.</li>
 </ul>

 <h4 id="metrics-">Metrics :</h4>
 <ul>
   <li>Added support for Prometheus metrics exposure.</li>
   <li>Added templates for Grafana Dashboard.</li>
 </ul>

 <h4 id="optimization">Optimization:</h4>
 <ul>
   <li>Optimized Restful clients and plugins loader.</li>
   <li>Optimized Service-Count calculation rule.</li>
   <li>Use CDN for resolving all the dependencies of frontend.</li>
 </ul>

 <h4 id="bug-fix-2">Bug-Fix:</h4>
 <ul>
   <li>Fix panic issue while deleting instance and invalid metrics request.</li>
   <li>Fix modify schema response issue and heart-beat failure when etcd has no leader.</li>
   <li>Fix batch delete api to exempt from unregistering service-center microservice.</li>
   <li>Fix watcher wrong event sequence when SC modify resource concurrently</li>
   <li>Fix discovery of default APP services in Shared service mode</li>
 </ul>


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