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Knowledge Base

Changing VMware vCloud Director Java heap size to prevent java.lang.OutOfMemoryError messages (1026355)

Last Updated: 12/26/2018Categories: TroubleshootingTotal Views: 10738Language:
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Details

When vCloud Director logs messages of the form java.lang.OutOfMemoryError, it often indicates that the default JVM heap size is inadequate for the load being placed on a vCloud Director cell. You can reconfigure the default heap size if necessary.

A java dump file, java_pid#.hpof is generated in the vCloud Director logs directory, located at /opt/vmware/vcloud-director/logs/.

The cell.log or the cell.log.last logs contain entries similar to:

Successfully posted pending audit events: com/vmware/vcloud/event/cell/start

Successfully started remote JMX connector on port 8999

java.lang.OutOfMemoryError: GC overhead limit exceeded

Dumping heap to /opt/vmware/vcloud-director/logs/java_pid32277.hprof ...

Uncaught Exception. Originating thread: Thread[170684272@pool-jetty-14,5,main]. Message: GC overhead limit exceeded

Application shutdown event: Beginning

Dump file is incomplete: file size limit

log4j:ERROR Failed to flush writer,

java.io.IOException: No space left on device

at java.io.FileOutputStream.writeBytes(Native Method)

Note: This error may also be reported in the vcloud-container-debug.log file.

INFO |vmware-vcd-watchdog started

The vmware-vcd-watchdog.log file may contain entries similar to:

ERROR | vmware-vcd-cell requires additional disk space to start, will not try to restart

INFO | vmware-vcd-watchdog exiting

Note: For more information on vCloud Director logs see: Viewing the vCloud Director Logs

Solution

To modify the default values for vCloud Director Java heap size:

Log in to a vCloud Director server host as root.

Open the $VCLOUD_HOME/bin/vmware-vcd-cell file using a text editor.

Note: For VMware vCloud Director for Service Providers 9.x and higher, the file to edit is $VCLOUD_HOME/bin/vmware-vcd-cell-common

Search for an entry like this one within the file (values shown for -Xms, -Xmx, and -XX:MaxPermSize might be different on your system):

JAVA_OPTS="\${JAVA_OPTS:--Xms512M -Xmx1024M -XX:MaxPermSize=256m
-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${VCLOUD_HOME}/logs} \

${ESB_JAVA_OPTS} \

${VCLOUD_JAVA_OPTS}"

Modify the entry and increase the values for these parameters:

-Xms – Specifies the initial heap size

-Xmx – Specifies the maximum heap size

-XX:MaxPermSize – Specifies the size of the Permanent Generation

Note: Do not modify any other parameters in this entry.

Stop and restart the vCloud Director services on the host.

Repeat this procedure for all other hosts in the vCloud Director cluster.

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