Looks like nightly 6.x is stalled in the same way.
https://builds.apache.org/job/Lucene-Solr-NightlyTests-6.x/185

Typically this takes ~4-6 hours and it is on 23+ and counting.

Kevin Risden

On Mon, Oct 10, 2016 at 12:08 PM, Dawid Weiss <dawid.we...@gmail.com> wrote:

> Thanks Uwe, this helps a lot!
>
> There is a resource deadlock here (an interplay of loggers, sysouts
> and junit4 stream redirectors and uncaught exception handlers...).
> It's really complex, but I'll try to get to the bottom of it.
>
> This completely aside, over 40 THOUSAND threads are hanging inside
> jetty's http handlers... there should be a more reasonable limit to
> this I guess?!
>
> "qtp1445698227-45502" #45502 prio=5 os_prio=0 tid=0x00007f5f5447c000
> nid=0x4ec1 waiting for monitor entry [0x00007f5f26327000]
>    java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.log4j.Category.callAppenders(Category.java:204)
> - waiting to lock <0x00000000e00a8348> (a org.apache.log4j.spi.RootLogger)
> at org.apache.log4j.Category.forcedLog(Category.java:391)
> at org.apache.log4j.Category.log(Category.java:856)
> at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:497)
> at org.apache.solr.common.SolrException.log(SolrException.java:159)
> at org.apache.solr.servlet.ResponseUtils.getErrorInfo(
> ResponseUtils.java:65)
>
> Dawid
>
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