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| <h2 title="Class DeadServer" class="title">Class DeadServer</h2> |
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| <li>org.apache.hadoop.hbase.master.DeadServer</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.47">DeadServer</a> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Class to hold dead servers list and utility querying dead server list. |
| Servers are added when they expire or when we find them in filesystem on startup. |
| When a server crash procedure is queued, it will populate the processing list and |
| then remove the server from processing list when done. Servers are removed from |
| dead server list when a new instance is started over the old on same hostname and |
| port or when new Master comes online tidying up after all initialization. Processing |
| list and deadserver list are not tied together (you don't have to be in deadservers |
| list to be processing and vice versa).</div> |
| </li> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#deadServers">deadServers</a></span></code> |
| <div class="block">Set of known dead servers.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#LOG">LOG</a></span></code> </td> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#DeadServer--">DeadServer</a></span>()</code> </td> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#cleanAllPreviousInstances-org.apache.hadoop.hbase.ServerName-">cleanAllPreviousInstances</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> newServerName)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#cleanOldServerName-org.apache.hadoop.hbase.ServerName-java.util.Iterator-">cleanOldServerName</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> newServerName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> deadServerIterator)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>(package private) boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#cleanPreviousInstance-org.apache.hadoop.hbase.ServerName-">cleanPreviousInstance</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> newServerName)</code> |
| <div class="block">Handles restart of a server.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#copyDeadServersSince-long-">copyDeadServersSince</a></span>(long ts)</code> |
| <div class="block">Extract all the servers dead since a given time, and sort them.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#copyServerNames--">copyServerNames</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Date.html?is-external=true" title="class or interface in java.util">Date</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#getTimeOfDeath-org.apache.hadoop.hbase.ServerName-">getTimeOfDeath</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> deadServerName)</code> |
| <div class="block">Get the time when a server died</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#isDeadServer-org.apache.hadoop.hbase.ServerName-">isDeadServer</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> serverName)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>(package private) boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#isEmpty--">isEmpty</a></span>()</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#putIfAbsent-org.apache.hadoop.hbase.ServerName-">putIfAbsent</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn)</code> |
| <div class="block">Adds the server to the dead server list if it's not there already.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#removeDeadServer-org.apache.hadoop.hbase.ServerName-">removeDeadServer</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> deadServerName)</code> |
| <div class="block">Called from rpc by operator cleaning up deadserver list.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#size--">size</a></span>()</code> </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/DeadServer.html#toString--">toString</a></span>()</code> </td> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
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| <h4>LOG</h4> |
| <pre>private static final org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.48">LOG</a></pre> |
| </li> |
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| <h4>deadServers</h4> |
| <pre>private final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.57">deadServers</a></pre> |
| <div class="block">Set of known dead servers. On znode expiration, servers are added here. |
| This is needed in case of a network partitioning where the server's lease |
| expires, but the server is still running. After the network is healed, |
| and it's server logs are recovered, it will be told to call server startup |
| because by then, its regions have probably been reassigned.</div> |
| </li> |
| </ul> |
| </li> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
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| <h4>DeadServer</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.47">DeadServer</a>()</pre> |
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| <h4>isDeadServer</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.63">isDeadServer</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> serverName)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>serverName</code> - server name.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if this server is on the dead servers list false otherwise</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="copyServerNames--"> |
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| <h4>copyServerNames</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.67">copyServerNames</a>()</pre> |
| </li> |
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| <a name="putIfAbsent-org.apache.hadoop.hbase.ServerName-"> |
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| <h4>putIfAbsent</h4> |
| <pre>void <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.76">putIfAbsent</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn)</pre> |
| <div class="block">Adds the server to the dead server list if it's not there already.</div> |
| </li> |
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| <h4>size</h4> |
| <pre>public int <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.80">size</a>()</pre> |
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| <h4>isEmpty</h4> |
| <pre>boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.84">isEmpty</a>()</pre> |
| </li> |
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| <h4>cleanPreviousInstance</h4> |
| <pre>boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.97">cleanPreviousInstance</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> newServerName)</pre> |
| <div class="block">Handles restart of a server. The new server instance has a different start code. |
| The new start code should be greater than the old one. We don't check that here. |
| Removes the old server from deadserver list.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>newServerName</code> - Servername as either <code>host:port</code> or |
| <code>host,port,startcode</code>.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if this server was dead before and coming back alive again</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>cleanAllPreviousInstances</h4> |
| <pre>void <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.107">cleanAllPreviousInstances</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> newServerName)</pre> |
| </li> |
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| <h4>cleanOldServerName</h4> |
| <pre>private boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.121">cleanOldServerName</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> newServerName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> deadServerIterator)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>newServerName</code> - Server to match port and hostname against.</dd> |
| <dd><code>deadServerIterator</code> - Iterator primed so can call 'next' on it.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>True if <code>newServerName</code> and current primed |
| iterator ServerName have same host and port and we removed old server |
| from iterator and from processing list.</dd> |
| </dl> |
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| <a name="toString--"> |
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| <h4>toString</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.134">toString</a>()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd> |
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| <h4>copyDeadServersSince</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>>> <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.153">copyDeadServersSince</a>(long ts)</pre> |
| <div class="block">Extract all the servers dead since a given time, and sort them.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ts</code> - the time, 0 for all</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a sorted array list, by death time, lowest values first.</dd> |
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| <a name="getTimeOfDeath-org.apache.hadoop.hbase.ServerName-"> |
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| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Date.html?is-external=true" title="class or interface in java.util">Date</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.171">getTimeOfDeath</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> deadServerName)</pre> |
| <div class="block">Get the time when a server died</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>deadServerName</code> - the dead server name</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the date when the server died</dd> |
| </dl> |
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| <a name="removeDeadServer-org.apache.hadoop.hbase.ServerName-"> |
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| <h4>removeDeadServer</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/master/DeadServer.html#line.181">removeDeadServer</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> deadServerName)</pre> |
| <div class="block">Called from rpc by operator cleaning up deadserver list.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>deadServerName</code> - the dead server name</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if this server was removed</dd> |
| </dl> |
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