Below is the OOM exception.

2017-08-07 12:45:48.446 WARN  (qtp33524623-4275) [c:taoke s:shard2 r:core_node4 
x:taoke_shard2_replica1] o.e.j.u.t.QueuedThreadPool
java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method)
        at java.lang.Thread.start(Thread.java:714)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.startThreads(QueuedThreadPool.java:475)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$200(QueuedThreadPool.java:48)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:579)
        at java.lang.Thread.run(Thread.java:745)


The timeout exception is thrown as well.

2017-08-07 13:20:20.336 ERROR (qtp33524623-2666) [c:taoke s:shard2 r:core_node4 
x:taoke_shard2_replica1] o.a.s.h.RequestHandlerBase 
org.apache.solr.update.processor.DistributedUpdateProcessor$DistributedUpdatesAsyncException:
 Async exception during distributed update: Read timed out
        at 
org.apache.solr.update.processor.DistributedUpdateProcessor.doFinish(DistributedUpdateProcessor.java:973)
        at 
org.apache.solr.update.processor.DistributedUpdateProcessor.finish(DistributedUpdateProcessor.java:1912)
        at 
org.apache.solr.update.processor.LogUpdateProcessorFactory$LogUpdateProcessor.finish(LogUpdateProcessorFactory.java:182)
        at 
org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:78)
        at 
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:173)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:2440)
        at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:723)
        at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:529)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:347)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:298)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1691)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
        at 
org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
        at org.eclipse.jetty.server.Server.handle(Server.java:534)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
        at 
org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)

Thanks
Hawk

> On 7 Aug 2017, at 2:21 PM, Shawn Heisey <apa...@elyograg.org> wrote:
> 
> On 8/6/2017 10:29 PM, hawk....@139.com wrote:
>> We found the problem is caused by the delete command. The request is used to 
>> delete document by id.
>> 
>> url --> http://10.91.1.120:8900/solr/taoke/update?&commit=true&wt=json
>>    body --> {"delete":["20ec36ade0ca4da3bcd78269e2300f6f"]}
>> 
>> When we send over 3000 requests, the Solr starts to give OOM exceptions.  
> 
> Do you have the full exception with stacktrace for those OOM?  I'm
> curious exactly what resource ran out, whether it was heap or something
> else.
> 
> When java programs throw OOME, the program's execution is usually
> completely unpredictable from that point on, because something that the
> program tried to do did not happen.  Whatever the program tries to do
> next probably depends on the action that failed.  This unpredictability
> is why Solr on non-windows systems will self-terminate when OOME is
> encountered.  It's the only safe action to take.  There is an issue to
> bring the same self-termination on OOME to Solr running on Windows.
> 
> If the OOME was due to heap space, there are exactly two ways to deal
> with that.  You can find info about it here:
> 
> https://wiki.apache.org/solr/SolrPerformanceProblems#Java_Heap
> 
> Thanks,
> Shawn
> 
> 


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