Solr does not response most of the update request some times

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Solr does not response most of the update request some times

aaron sun
Hello, 
I registered a issue as below, 

Maybe some kind develop would also help me here.
Any hint would be appreciated!

//Aaron

============================================================================
Solr version:

{noformat}

solr-spec
8.4.1
solr-impl
8.4.1 832bf13dd9187095831caf69783179d41059d013 - ishan - 2020-01-10 13:40:28
lucene-spec
8.4.1
lucene-impl
8.4.1 832bf13dd9187095831caf69783179d41059d013 - ishan - 2020-01-10 13:35:00

{noformat}



Java process:

{noformat}

java -Xms100G -Xmx200G -DSTOP.PORT=8078 -DSTOP.KEY=ardsolrstop -Dsolr.solr.home=/ardome/solr -Djetty.port=8983 -Dsolr.log.dir=/var/ardendo/log -jar start.jar --module=http

{noformat}

Run on a powerful server with 32 cores, 265GB RAM.

The problem is that time to time it start to get very slow to update solr documents, for example time out after 30 minutes.

document size is around 20k~50K each, each http request send to /update is around 4MB~10MB.

According to jstack for the thread state, lots of BLOCKED state.

thread dump log is attached.

Any hint would be appreciate, thanks!



























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jstack_bad_state.log (8M) Download Attachment