-XX:OnOutOfMemoryError=“ ” gives Error : Could not find or load main class

Question

I have set JAVA_OPTS as

export JAVA_OPTS=\"$JAVA_OPTS -server -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -Xloggc:gc.log  -Dcom.sun.management.jmxremote.ssl=f         


        

Answer 1

Try

export JAVA_OPTS="... \"-XX:OnError=$TEMP_CMD\" ..."

or

export JAVA_OPTS='... "-XX:OnError=$TEMP_CMD" ...'

See Bash nested quotes and eval and http://www.grymoire.com/Unix/Quote.html.

Update

The above appears still not to work after testing.

test.sh

JAVA_OPTS="$JAVA_OPTS -Xmx32m '-XX:OnOutOfMemoryError=echo %p'"
java $JAVA_OPTS Test

gives

$ bash -x ./test.sh
+ JAVA_OPTS=' -Xmx32m '\''-XX:OnOutOfMemoryError=echo %p'\'''
+ java -Xmx32m ''\''-XX:OnOutOfMemoryError=echo' '%p'\''' Test
Exception in thread "main" java.lang.NoClassDefFoundError: '-XX:OnOutOfMemoryError=echo

fail.

JAVA_OPTS="$JAVA_OPTS -Xmx32m -XX:OnOutOfMemoryError=\"echo %p\""
java $JAVA_OPTS Test

gives

$ bash -x ./test.sh
+ JAVA_OPTS=' -Xmx32m -XX:OnOutOfMemoryError="echo %p"'
+ java -Xmx32m '-XX:OnOutOfMemoryError="echo' '%p"' Test
Exception in thread "main" java.lang.NoClassDefFoundError: %p"

fail.

Diagnostics with -x bash option helped to google that the root of the problem is in a strange mix of bash variable substitution and word splitting rules: http://mywiki.wooledge.org/BashFAQ/050.

There are several possible workarounds.

1) Use helper script to get rid of obstinate spaces

JAVA_OPTS+=" -Xmx32m -XX:OnOutOfMemoryError=/usr/tmp/test/oom.sh"
java $JAVA_OPTS Test

2) Move OnOutOfMemoryError out of variable

JAVA_OPTS="$JAVA_OPTS -Xmx32m"
java $JAVA_OPTS -XX:OnOutOfMemoryError="echo %p" Test

gives

$ bash -x ./test.sh
+ JAVA_OPTS=' -Xmx32m'
+ /usr/java/jdk1.6.0_16/bin/java -Xmx32m '-XX:OnOutOfMemoryError=echo %p' Test
#
# java.lang.OutOfMemoryError: Java heap space
# -XX:OnOutOfMemoryError="echo %p"
#   Executing /bin/sh -c "echo 1639"...
1639