Issue : Solr Server becoming Un-responsive

[Abhimeet, Kumar]

Hi Team,


We are facing an issue of Solr becoming unresponsive after every 2-3 Hrs. We 
recently increased the allocated JVM size on Solr up to 11GB, since then the 
issue is very frequent.


Current Java Settings on Solr are:

java -server -Xms11095m -Xmx11095m -XX:NewRatio=3 -XX:SurvivorRatio=4 
-XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=8 -XX:+UseConcMarkSweepGC 
-XX:+UseParNewGC -XX:ConcGCThreads=4 -XX:ParallelGCThreads=4 
-XX:+CMSScavengeBeforeRemark -XX:PretenureSizeThreshold=64m 
-XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=50 
-XX:CMSMaxAbortablePrecleanTime=6000 -XX:+CMSParallelRemarkEnabled 
-XX:+ParallelRefProcEnabled -XX:-OmitStackTraceInFastThrow -verbose:gc 
-XX:+PrintHeapAtGC -XX:+PrintGCDetails -XX:+PrintGCDateStamps 
-XX:+PrintGCTimeStamps -XX:+PrintTenuringDistribution 
-XX:+PrintGCApplicationStoppedTime 
-Xloggc:/opt/solr-7.1.0/server/logs/solr_gc.log -XX:+UseGCLogFileRotation 
-XX:NumberOfGCLogFiles=9 -XX:GCLogFileSize=20M 
-Dsolr.log.dir=/opt/solr-7.1.0/server/logs -Djetty.port=8983 -DSTOP.PORT=7983 
-DSTOP.KEY=solrrocks -Duser.timezone=UTC -Djetty.home=/opt/solr-7.1.0/server 
-Dsolr.solr.home=/opt/solr-7.1.0/server/solr -Dsolr.data.home= 
-Dsolr.install.dir=/opt/solr-7.1.0 
-Dsolr.default.confdir=/opt/solr-7.1.0/server/solr/configsets/_default/conf 
-Xss256k -Dsolr.jetty.https.port=8983 -Dsolr.log.muteconsole 
-XX:OnOutOfMemoryError=/opt/solr-7.1.0/bin/oom_solr.sh 8983 
/opt/solr-7.1.0/server/logs -jar start.jar


Cache Configs are:


<filterCache class="solr.FastLRUCache"

                 size="512"

                 initialSize="512"

                 autowarmCount="0"/>

<queryResultCache class="solr.LRUCache"

                     size="512"

                     initialSize="512"

                     autowarmCount="0"/>

<documentCache class="solr.LRUCache"

                   size="512"

                   initialSize="512"

                   autowarmCount="0"/>


Find the attached thread dumps.


Please help!






Kumar Abhimeet | ICF Next
Senior Consultant
c: 080-46409406
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<<attachment: dumps-06Aug2019.zip>>