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From Kent Mu <solr.st...@gmail.com>
Subject solrcloud goes down
Date Sun, 03 Jul 2016 01:56:34 GMT
Hi all

I came across a problem when use solrcloud, it goes down. The version is
4.9.0.

we got the java core log, it looks like the http connection pool is
exhausted and most threads are waiting to get a free connection.

I have increased http connection defaults for the SolrJ client, and also
configed the connection defaults in solr.xml for all shard servers as below.


<shardHandlerFactory name="shardHandlerFactory"
class="HttpShardHandlerFactory">
    <int name="socketTimeout">60000</int>
    <int name="connTimeout">30000</int>
    <int name="maxConnections">10000</int>
    <int name="maxConnectionsPerHost">500</int>
</shardHandlerFactory>

*the java stack as below*

"httpShardExecutor-3-thread-541" prio=10 tid=0x00007f7b1c02b000 nid=0x20af
waiting on condition [0x00007f79fd490000]
   java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for  <0x0000000605710068> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
at org.apache.http.pool.PoolEntryFuture.await(PoolEntryFuture.java:133)
at
org.apache.http.pool.AbstractConnPool.getPoolEntryBlocking(AbstractConnPool.java:282)
at
org.apache.http.pool.AbstractConnPool.access$000(AbstractConnPool.java:64)
at
org.apache.http.pool.AbstractConnPool$2.getPoolEntry(AbstractConnPool.java:177)
at
org.apache.http.pool.AbstractConnPool$2.getPoolEntry(AbstractConnPool.java:170)
at org.apache.http.pool.PoolEntryFuture.get(PoolEntryFuture.java:102)
at
org.apache.http.impl.conn.PoolingClientConnectionManager.leaseConnection(PoolingClientConnectionManager.java:208)
at
org.apache.http.impl.conn.PoolingClientConnectionManager$1.getConnection(PoolingClientConnectionManager.java:195)
at
org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:422)
at
org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)
at
org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:452)
at
org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:210)
at
org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:206)
at
org.apache.solr.client.solrj.impl.LBHttpSolrServer.doRequest(LBHttpSolrServer.java:340)
at
org.apache.solr.client.solrj.impl.LBHttpSolrServer.request(LBHttpSolrServer.java:301)
at
org.apache.solr.handler.component.HttpShardHandlerFactory.makeLoadBalancedRequest(HttpShardHandlerFactory.java:205)
at
org.apache.solr.handler.component.HttpShardHandler$1.call(HttpShardHandler.java:162)
at
org.apache.solr.handler.component.HttpShardHandler$1.call(HttpShardHandler.java:119)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)

*please help me, look forward to your reply. Thanks a lot!*


Best Regards!
Kent

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