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From Erick Erickson <erickerick...@gmail.com>
Subject Re: Solr Cloud with 5 servers cluster failed due to Leader out of memory
Date Mon, 08 Aug 2016 15:59:58 GMT
Yeah, Shawn, but you, like, know something about Tomcat and
actually provide useful advice ;)

On Mon, Aug 8, 2016 at 6:44 AM, Shawn Heisey <apache@elyograg.org> wrote:
> On 8/7/2016 6:53 PM, Tim Chen wrote:
>> Exception in thread "http-bio-8983-exec-6571" 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 java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:949)
>>         at java.util.concurrent.ThreadPoolExecutor.processWorkerExit(ThreadPoolExecutor.java:1017)
>>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1163)
>>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>>         at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
>>         at java.lang.Thread.run(Thread.java:745)
>
> I find myself chasing Erick once again. :)  Supplementing what he told you:
>
> There are two things that might be happening here.
>
> 1) The Tomcat setting "maxThreads" may limiting the number of threads.
> This defaults to 200, and should be increased to 10000.  The specific
> error doesn't sound like an application limit, though -- it acts more
> like Java itself can't create the thread.  If you have already adjusted
> maxThreads, then it's more likely to be the second option:
>
> 2) The operating system may be imposing a limit on the number of
> processes/threads a user is allowed to start.  On Linux systems, this is
> typically 1024.  For other operating systems, I am not sure what the
> default limit is.
>
> Thanks,
> Shawn
>

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