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INFO [main] 2016-10-03 04:21:29,941 CassandraDaemon.java:205 - JVM Arguments: [-ea, -javaagent:/usr/share/cassandra/lib/jamm-0.3.0.jar, -XX:+CMSClassUnloadingEnabled, -XX:+UseThreadPriorities, -XX:ThreadPriorityPolicy=42, -Xms6G, -Xmx6G, -Xmn600M, *-XX:+HeapDumpOnOutOfMemoryError, -XX:HeapDumpPath=/cassandra/dumps/cassandra-1475461287-pid34435.hprof*, -Xss256k, -XX:StringTableSize=1000003, -XX:+UseParNewGC, -XX:+UseConcMarkSweepGC, -XX:+CMSParallelRemarkEnabled, -XX:SurvivorRatio=8, -XX:MaxTenuringThreshold=1, -XX:CMSInitiatingOccupancyFraction=30, -XX:+UseCMSInitiatingOccupancyOnly, -XX:+UseTLAB, -XX:CompileCommandFile=/etc/cassandra/hotspot_compiler, -XX:CMSWaitDuration=10000, -XX:+CMSParallelInitialMarkEnabled, -XX:+CMSEdenChunksRecordAlways, -XX:CMSWaitDuration=10000, -XX:+UseCondCardMark, -XX:+PrintGCDetails, -XX:+PrintGCDateStamps, -XX:+PrintGCApplicationStoppedTime, -Xloggc:/var/opt/hosting/log/cassandra/gc.log, -XX:+UseGCLogFileRotation, -XX:NumberOfGCLogFiles=20, -XX:GCLogFileSize=20M, -Djava.net.preferIPv4Stack=true, -Dcom.sun.management.jmxremote.port=7199, -Dcom.sun.management.jmxremote.rmi.port=7199, -Dcom.sun.management.jmxremote.ssl=false, -Dcom.sun.management.jmxremote.authenticate=false, -Dcom.sun.management.jmxremote.password.file=/etc/cassandra/jmxremote.password, -Djava.io.tmpdir=/var/opt/hosting/db/cassandra/tmp, -javaagent:/usr/share/cassandra/lib/jolokia-jvm-1.0.6-agent.jar=port=8778,host=0.0.0.0, -Dcassandra.auth_bcrypt_gensalt_log2_rounds=4, -Dlogback.configurationFile=logback.xml, -Dcassandra.logdir=/var/log/cassandra, -Dcassandra.storagedir=, -Dcassandra-pidfile=/var/run/cassandra/cassandra.pid, *-XX:HeapDumpPath=/var/lib/cassandra/java_1475461286.hprof*, -XX:ErrorFile=/var/lib/cassandra/hs_err_1475461286.log] This option is defined in cassandra-env.sh if [ "x$CASSANDRA_HEAPDUMP_DIR" != "x" ]; then JVM_OPTS="$JVM_OPTS -XX:HeapDumpPath=$CASSANDRA_HEAPDUMP_DIR/cassandra-`date +%s`-pid$$.hprof" fi and we defined before the value of CASSANDRA_HEAPDUMP_DIR before to */cassandra/dumps/* It is seems that cassandra does not care about the conf in cassandra-env.sh and he only takes in account the last set for HeapDumpPath */var/lib/cassandra/java_1475461286.hprof* This causes problems when we have to dump the heap because cassandra uses the disk not suitable to do it. Is *XX:HeapDumpPath *set in another place/file that I dont know? Thxs Jean Carlo "The best way to predict the future is to invent it" Alan Kay --94eb2c0d40963e69bb053df30346 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Hi

I see in the log of my= node cassandra that the parameter -XX:HeapDumpPath is charged two times.
INFO=C2=A0 [main] 2016-10-03 04:21:29,941 CassandraDaemon.java:205 - = JVM Arguments: [-ea, -javaagent:/usr/share/cassandra/lib/jamm-0.3.0.jar, -X= X:+CMSClassUnloadingEnabled, -XX:+UseThreadPriorities, -XX:ThreadPriorityPo= licy=3D42, -Xms6G, -Xmx6G, -Xmn600M, -XX:+HeapDumpOnOutOfMemoryError, -X= X:HeapDumpPath=3D/cassandra/dumps/cassandra-1475461287-pid34435.hprof, = -Xss256k, -XX:StringTableSize=3D1000003, -XX:+UseParNewGC, -XX:+UseConcMark= SweepGC, -XX:+CMSParallelRemarkEnabled, -XX:SurvivorRatio=3D8, -XX:MaxTenur= ingThreshold=3D1, -XX:CMSInitiatingOccupancyFraction=3D30, -XX:+UseCMSIniti= atingOccupancyOnly, -XX:+UseTLAB, -XX:CompileCommandFile=3D/etc/cassandra/h= otspot_compiler, -XX:CMSWaitDuration=3D10000, -XX:+CMSParallelInitialMarkEn= abled, -XX:+CMSEdenChunksRecordAlways, -XX:CMSWaitDuration=3D10000, -XX:+Us= eCondCardMark, -XX:+PrintGCDetails, -XX:+PrintGCDateStamps, -XX:+PrintGCApp= licationStoppedTime, -Xloggc:/var/opt/hosting/log/cassandra/gc.log, -XX:+Us= eGCLogFileRotation, -XX:NumberOfGCLogFiles=3D20, -XX:GCLogFileSize=3D20M, -= Djava.net.preferIPv4Stack=3Dtrue, -Dcom.sun.management.jmxremote.port=3D719= 9, -Dcom.sun.management.jmxremote.rmi.port=3D7199, -Dcom.sun.management.jmx= remote.ssl=3Dfalse, -Dcom.sun.management.jmxremote.authenticate=3Dfalse, -D= com.sun.management.jmxremote.password.file=3D/etc/cassandra/jmxremote.passw= ord, -Djava.io.tmpdir=3D/var/opt/hosting/db/cassandra/tmp, -javaagent:/usr/= share/cassandra/lib/jolokia-jvm-1.0.6-agent.jar=3Dport=3D8778,host=3D0.0.0.= 0, -Dcassandra.auth_bcrypt_gensalt_log2_rounds=3D4, -Dlogback.configuration= File=3Dlogback.xml, -Dcassandra.logdir=3D/var/log/cassandra, -Dcassandra.st= oragedir=3D, -Dcassandra-pidfile=3D/var/run/cassandra/cassandra.pid, -XX= :HeapDumpPath=3D/var/lib/cassandra/java_1475461286.hprof, -XX:ErrorFile= =3D/var/lib/cassandra/hs_err_1475461286.log]

This option is defined in cassandra-env.sh

if= [ "x$CASSANDRA_HEAPDUMP_DIR" !=3D "x" ]; then
=C2= =A0=C2=A0=C2=A0 JVM_OPTS=3D"$JVM_OPTS -XX:HeapDumpPath=3D$CASSANDRA_HE= APDUMP_DIR/cassandra-`date +%s`-pid$$.hprof"
fi
=C2=A0and we defined before the = value of CASSANDRA_HEAPDUMP_DIR before to=
/cassandra/dumps/

It is seems that cassandra does not care about the conf in cassandra-env.s= h and he only takes in account the last set for HeapDumpPath /var/lib/ca= ssandra/java_1475461286.hprof

This caus= es problems when we have to dump the heap because cassandra uses the disk n= ot suitable to do it.

Is=C2=A0 XX:HeapDu= mpPath set in another place/file that I dont know?

Th= xs

Jean Carlo

"The best way to pre= dict the future is to invent it" Alan Kay
=
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