2185842 - AS-JAVA doesn't start, "-X" or "-XX" JVM options are set | SAP Knowledge Base Article

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2185842 - AS-JAVA doesn't start, "-X" or "-XX" JVM options are set

Symptom

If "-X" or "-XX" are set among the additional JVM options without a real parameter, the JVM just prints the available non-standard (starting with -X or -XX) JVM options and exits. In this case, a list like below gets printed into dev_serverX and std_serverX.out:

-Xbootclasspath:<directories and zip/jar files separated by ;>
set search path for bootstrap classes and resources
-Xbootclasspath/a:<directories and zip/jar files separated by ;>
append to end of bootstrap class path
-Xbootclasspath/p:<directories and zip/jar files separated by ;>
prepend in front of bootstrap class path
-Xcp/a:<path> append path to class path
-Xcp/ad:<dir> append all jars inside a directory to the class path
-Xcp/p:<path> prepend path to class path
-Xcp/pd:<dir> prepend all jars inside a directory to the class path
-Xmn<size> set initial/maximum Java new space size
-Xms<size> set initial Java heap size
-Xmx<size> set maximum Java heap size
-Xss<size> set Java thread stack size
-Xps<size> set maximum shared pool size
-Xloggc:<file> log garbage collection status to a file with time stamps
-Xmixed execute methods in mixed (interpreted and compiled) mode
-Xint execute methods in interpreted mode only
-XignoreUnrecognizedOptions
ignore unrecognized options when processing VM arguments
-Xcheck:jni perform additional checks for JNI functions
-Xverify[:remote|all|none]
perform class verification for remote classes loaded over
network connections, all loaded classes, or no classes
-Xfuture enable strictest checks, anticipating future default
-Xjvmx enable VM extensions, requires a VM instance number passed
via -XsapSystem
-XsapSystem:<number>
set the VM's instance number
-XdebugPortRange:<from>[-<to>]
set range for debugger TCP ports
-Xrun<libname>[:<options>]
load native agent library <libname>
-XbuildInfo print out detailed build information and exit
-XshowBuildInfo print out detailed build information and continue
-Xtrace<trace> set trace flags, see -Xtrace for details

One can find one of the mentioned options in the configtool:

X or XX.jpg

Or in dev_serverX:

X or XX in dev.jpg

 

No jvm_serverX.out file gets created and since this is the intended behavior no error can be found in the logs.

 


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Environment

All versions of SAP Java Virtual Machine (SAP JVM)

Product

SAP Java Virtual Machine all versions

Keywords

KBA , BC-JVM , SAP Java Virtual Machine , BC-JAS-COR , Enterprise Runtime, Core J2EE Framework , Problem

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