The new VM option for Out Of Memory Error 'HeapDumpFile' which helps name the heap dump file which is created with 'HeapDumpOnOutOfMemoryError' is accepting "space" as a file name.

<output>

bash-2.05$ which java
/net/vmsqe.sfbay/export/nightly/tiger/JDK/service_hs_baseline/jdk1.6/solaris-sparc/bin/java
bash-2.05$ java -XX:HeapDumpFile=" " -XX:OnOutOfMemoryError="" -Xmx6m -Xms6m -XX:+HeapDumpOnOutOfMemoryError InnerClassOOME
VM option 'HeapDumpFile= '
VM option 'OnOutOfMemoryError='
VM option '+HeapDumpOnOutOfMemoryError'
java.lang.OutOfMemoryError: Java heap space
Dumping heap to ...
Heap dump file created [6568350 bytes in 0.684 secs]
#
# java.lang.OutOfMemoryError: Java heap space
# -XX:OnOutOfMemoryError=""
The stack according to printStackTrace():
java.lang.OutOfMemoryError: Java heap space
        at InnerClassOOME$InnerKlazz.<init>(InnerClassOOME.java:30)
        at InnerClassOOME.main(InnerClassOOME.java:20)

bash-2.05$ ls -l
total 38562
-rw------- 1 bk150999 staff 6568176 Jun 24 00:58 ---> This is I am refering; file created with name space(" ")
-rw------- 1 bk150999 staff 1005 Jun 24 01:01 hotspot.log
-rw------- 1 bk150999 staff 137 May 27 10:13 InnerClassOOME.cfg
-rw------- 1 bk150999 staff 620 Jun 24 00:45 InnerClassOOME.class
-rw------- 1 bk150999 staff 1864 Jun 24 00:45 InnerClassOOME$InnerKlazz.class
-rw------- 1 bk150999 staff 2235 Jun 9 01:02 InnerClassOOME.java
-rw------- 1 bk150999 staff 734 May 27 08:23 InnerClassOOME.README
-rw------- 1 bk150999 staff 6568176 Jun 24 01:01 java_pid22049.hprof
-rw------- 1 bk150999 staff 6568176 Jun 24 00:47 my.hprof.file

</output>
###@###.### 2005-06-27 04:10:52 GMT

When -XX:HeapDumpFile is specified more than once then dump file created with new line character ("\n") seperating them.

<Command>
bash:$> java -XX:HeapDumpFile="file1.hprof.dump" -XX:+HeapDumpOnOutOfMemoryError -Xmx -Xms -XX:HeapDumpFile="file2.hprof.dump" InnerClassOOME
VM option '+HeapDumpOnOutOfMemoryError'
VM option 'HeapDumpFile=file1.hprof'
VM option 'HeapDumpFile=file2.hprof'
java.lang.OutOfMemoryError: Java heap space
Dumping heap to file1.hprof
file2.hprof ...
Heap dump file created [6568557 bytes in 0.657 secs]
The stack according to printStackTrace():
java.lang.OutOfMemoryError: Java heap space
        at InnerClassOOME$InnerKlazz.<init>(InnerClassOOME.java:30)
        at InnerClassOOME.main(InnerClassOOME.java:20)
</Command>

Upon executing the above command dump file created as "file1.hprof \n file2.hprof" name.

###@###.### 2005-06-28 14:12:29 GMT