Details
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Bug
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Status: Open
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Major
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Resolution: Unresolved
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10.8.3.0, 10.14.2.0
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None
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None
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Urgent
Description
We have two runtime environments v7.5.4 and v7.5.3 similar in terms of OS memory, java version and java launch command settings for the derby and other java processes required for our application in which similar projects/workloads are running. But in one of the environments we are seeing out of memory (OOM) exceptions in the derby server java process. In this environment where OOM is occurring, we even refreshed Apache derby to the latest version available for Java 8 and still encountered OOM exceptions. Please help resolve this OOM issue.
Exception in thread "DRDAConnThread_39" Exception in thread "DRDAConnThread_41" java/lang/OutOfMemoryError: Java heap space
at java/nio/CharBuffer.wrap (CharBuffer.java:373)
at sun/nio/cs/StreamEncoder.implWrite (StreamEncoder.java:277)
at sun/nio/cs/StreamEncoder.write (StreamEncoder.java:137)
at java/io/OutputStreamWriter.write (OutputStreamWriter.java:244)
at java/io/BufferedWriter.flushBuffer (BufferedWriter.java:140)
at java/io/PrintStream.write (PrintStream.java:550)
at java/io/PrintStream.print (PrintStream.java:693)
at java/io/PrintStream.append (PrintStream.java:1089)
at java/io/PrintStream.append (PrintStream.java:70)
at com/ibm/oti/util/Util.appendTo (Util.java:225)
at java/lang/Throwable.printStackTrace (Throwable.java:506)
at java/lang/Throwable.printStackTrace (Throwable.java:302)
at java/lang/Throwable.printStackTrace (Throwable.java:247)
Exception in thread "DRDAConnThread_43" java.lang.OutOfMemoryErrorjava.lang.OutOfMemoryError(?)java.lang.OutOfMemoryError: Java heap space
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:872)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:8java/lang/OutOfMemoryError: Java heap space
at java/lang/ThreadGroup.uncaughtException (ThreadGroup.java:872)
at java/lang/ThreadGroup.uncaughtException (ThreadGroup.java:866)
at java/lang/ThreadGroup.uncaughtException (ThreadGroup.java:866)
at java/lang/Thread.uncaughtException (Thread.java:1332)
-----------------------
:v7.5.4
OS: RHELv8 with 4GB RAM
Java: IBM Java SDK v8.0.6.0
Apache Derby v10.8.3.3, Apache Derby v10.14.2.0
[bceglc385/Standalone ~]# /usr/java/default/jre/bin/java -version
java version "1.8.0_231"
Java(TM) SE Runtime Environment (build 8.0.6.0 - pxa6480sr6-20191107_01(SR6))
IBM J9 VM (build 2.9, JRE 1.8.0 Linux amd64-64-Bit Compressed References 20191106_432135 (JIT enabled, AOT enabled)
OpenJ9 - f0b6be7
OMR - 18d8f94
IBM - 233dfb5)
JCL - 20191016_01 based on Oracle jdk8u231-b10
/usr/java/default/bin/java -server -Xdump:heap+system+snap:none -Xdump:heap:events=user,file=/var/log/javaheapdump-user-derby.ph -Xdump:heap:events=systhrow,filter=java/lang/OutOfMemoryError,file=/var/log/javaheapdump-oom-derby.phd,range=1..1 -Xdump!https://emoji.slack-edge.com/T27SFGS2W/java/c0a6f7d2f3faab62.png!defaults:file=/var/log/javacore-derby.txt -Xmx512m -Xms512m -Xmn192m -agentlib:CastIron -Xbootclasspath/p:/usr/ironhide/maestro/bundles/com.approuter.management.jmxremote-1.0.0.jar: -Xgcpolicy:gencon -Xverbosegclog:/var/log/derbyserver_gc.log,10,1000 -XX:+HeapManagementMXBeanCompatibility -Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.Jdk14Logger -Dderby.system.home=/usr/ironhide/var/db/staging -Dcom.sun.management.jmxremote -Dcom.approuter.management.jmxremote.connectorserver.port=31997 -Djmx.remote.protocol.provider.pkgs=com.approuter.management.jmxremote -Dcom.sun.management.jmxremote.port=1997 -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=true -Dcom.sun.management.jmxremote.password.file=/usr/ironhide/maestro/management/jmxremote.password -Dcom.sun.management.jmxremote.access.file=/usr/ironhide/maestro/management/jmxremote.access -Dcom.approuter.logging.filename=derbyserver.log -Djava.rmi.server.hostname=9.121.242.177 -Djava.net.preferIPv4Stack=true -Dcom.approuter.sysconf.appliance=true -Dcom.mchange.v2.log.MLog=com.mchange.v2.log.jdk14logging.Jdk14MLog -Dcom.mchange.v2.resourcepool.experimental.useScatteredAcquireTask=true -Dc3p0.checkoutTimeout=30000 -Dc3p0.maxIdleTimeExcessConnections=30 -Dc3p0.maxStatementsPerConnection=100 -Dc3p0.testConnectionOnCheckin=true -Dc3p0.testConnectionOnCheckout=true -Dc3p0.numHelperThreads=10 -Dosgi.clean=true -Dosgi.configuration.area=/usr/ironhide/maestro/bundles/derbyserver -Dorg.osgi.framework.bootdelegation=* -Declipse.application.noDefault=true -Declipse.consoleLog=true -Dcom.approuter.orcmon.purger.compressionmode=sequential -DIH_ROOT=/usr/ironhide -Djava.util.logging.config.file=/usr/ironhide/maestro/etc/logging.properties -jar /usr/ironhide/maestro/bundles/org.eclipse.osgi_3.10.1.v20140909-1633.jar
[bceglc390/Standalone ~]# cat /proc/meminfo
MemTotal: 4057920 kB
MemFree: 152896 kB
Buffers: 342624 kB
Cached: 729112 kB
SwapCached: 3428 kB
Active: 2644068 kB
Inactive: 1066404 kB
Active(anon): 1951704 kB
Inactive(anon): 712696 kB
Active(file): 692364 kB
Inactive(file): 353708 kB
Unevictable: 20 kB
Mlocked: 20 kB
SwapTotal: 3999736 kB
SwapFree: 3988760 kB
Dirty: 720 kB
Writeback: 0 kB
AnonPages: 2636560 kB
Mapped: 38508 kB
Shmem: 25648 kB
Slab: 129600 kB
SReclaimable: 48320 kB
SUnreclaim: 81280 kB
KernelStack: 6568 kB
PageTables: 11116 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 6028696 kB
Committed_AS: 1658244 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 152396 kB
VmallocChunk: 34359582800 kB
AnonHugePages: 2433024 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 4096 kB
DirectMap2M: 4190208 kB
----------
v7.5.3
OS: Bedrock v5 which is custom OS based on RHELv7 with 4GB RAM
Java: IBM Java SDK v8.0.6.0
Apache Derby v10.8.3.3
[bceglc390/Standalone ~]# /usr/java/default/jre/bin/java -version
java version "1.8.0_231"
Java(TM) SE Runtime Environment (build 8.0.6.0 - pxa6480sr6-20191107_01(SR6))
IBM J9 VM (build 2.9, JRE 1.8.0 Linux amd64-64-Bit Compressed References 20191106_432135 (JIT enabled, AOT enabled)
OpenJ9 - f0b6be7
OMR - 18d8f94
IBM - 233dfb5)
JCL - 20191016_01 based on Oracle jdk8u231-b10
/usr/java/default/bin/java -server -Xdump:heap+system+snap:none -Xdump:heap:events=user,file=/var/log/javaheapdump-user-derby.phd -Xdump:heap:events=systhrow,filter=java/lang/OutOfMemoryError,file=/var/log/javaheapdump-oom-derby.phd,range=1..1 -Xdump!https://emoji.slack-edge.com/T27SFGS2W/java/c0a6f7d2f3faab62.png!defaults:file=/var/log/javacore-derby.txt -Xmx512m -Xms512m -Xmn192m -agentlib:CastIron -Xbootclasspath/p:/usr/ironhide/maestro/bundles/com.approuter.management.jmxremote-1.0.0.jar: -Xgcpolicy:gencon -Xverbosegclog:/var/log/derbyserver_gc.log,10,1000 -XX:+HeapManagementMXBeanCompatibility -Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.Jdk14Logger -Dderby.system.home=/usr/ironhide/var/db/staging -Dcom.sun.management.jmxremote -Dcom.approuter.management.jmxremote.connectorserver.port=31997 -Djmx.remote.protocol.provider.pkgs=com.approuter.management.jmxremote -Dcom.sun.management.jmxremote.port=1997 -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=true -Dcom.sun.management.jmxremote.password.file=/usr/ironhide/maestro/management/jmxremote.password -Dcom.sun.management.jmxremote.access.file=/usr/ironhide/maestro/management/jmxremote.access -Dcom.approuter.logging.filename=derbyserver.log -Djava.rmi.server.hostname=9.124.112.240 -Djava.net.preferIPv4Stack=true -Dcom.approuter.sysconf.appliance=true -Dcom.mchange.v2.log.MLog=com.mchange.v2.log.jdk14logging.Jdk14MLog -Dcom.mchange.v2.resourcepool.experimental.useScatteredAcquireTask=true -Dc3p0.checkoutTimeout=30000 -Dc3p0.maxIdleTimeExcessConnections=30 -Dc3p0.maxStatementsPerConnection=100 -Dc3p0.testConnectionOnCheckin=true -Dc3p0.testConnectionOnCheckout=true -Dc3p0.numHelperThreads=10 -Dosgi.clean=true -Dosgi.configuration.area=/usr/ironhide/maestro/bundles/derbyserver -Dorg.osgi.framework.bootdelegation=* -Declipse.application.noDefault=true -Declipse.consoleLog=true -Dcom.approuter.orcmon.purger.compressionmode=sequential -DIH_ROOT=/usr/ironhide -Djava.util.logging.config.file=/usr/ironhide/maestro/etc/logging.properties -jar /usr/ironhide/maestro/bundles/org.eclipse.osgi_3.10.1.v20140909-1633.jar
[cldegdh9/Standalone log]# cat /proc/meminfo
MemTotal: 3872868 kB
MemFree: 343700 kB
MemAvailable: 374676 kB
Buffers: 33100 kB
Cached: 170624 kB
SwapCached: 3848 kB
Active: 2540784 kB
Inactive: 710092 kB
Active(anon): 2429812 kB
Inactive(anon): 621324 kB
Active(file): 110972 kB
Inactive(file): 88768 kB
Unevictable: 20 kB
Mlocked: 20 kB
SwapTotal: 5345272 kB
SwapFree: 5280760 kB
Dirty: 1880 kB
Writeback: 0 kB
AnonPages: 3044312 kB
Mapped: 33676 kB
Shmem: 3984 kB
Slab: 119980 kB
SReclaimable: 71120 kB
SUnreclaim: 48860 kB
KernelStack: 15116 kB
PageTables: 13936 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 7281704 kB
Committed_AS: 1755044 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 2885632 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
Hugetlb: 0 kB
DirectMap4k: 126912 kB
DirectMap2M: 4067328 kB
