#Command line option of openaudible code

In the example above, the gdb debugger is launched and attached to the current process when an unexpected error is encountered. On Linux the gdb command launches the debugger.

In the example above, the gcore command is executed to create the core image of the current process, and the debugger is started to attach to the process when an unexpected error is encountered. On Oracle Solaris operating system the gcore command creates a core image of the specified process, and the dbx command launches the debugger. Java -XX:OnError='gcore %p dbx - %p' MyApp In the example above, the contents of the fatal error log file are mailed to a support alias when a fatal error is encountered. Java -XX:OnError='cat hs_err_pid%p.log | mail MyApp In the example above, if a fatal error occurs, the pmap command is executed to display the address space of the current process. On Oracle Solaris operating system the pmap command displays information about the address space of a process. The following examples demonstrate how this option can be used when launching a Java application named MyApp with the java launcher. Within this string, all occurrences of %p are replaced with the current PID, and all occurrences of %% are replaced by a single %. The script or command is specified using the -XX:OnError= string command-line option, where string is a single command, or a list of commands separated by semicolons.

When a fatal error occurs, the Java HotSpot VM can optionally execute a user-supplied script or command. For example -XX:HeapDumpPath=/disk2/dumps will cause the heap dump to be generated in the /disk2/dumps directory. You can specify an alternative file name or directory with the -XX:HeapDumpPath= option. In this case the file is 507 MB and is created with the name java_pid2262.hprof in the current directory.īy default the heap dump is created in a file called java_pid pid.hprof in the working directory of the VM, as in the example above. When the exception is thrown, a heap dump file is created. The ConsumeHeap fills up the Java heap and runs out of memory. Heap dump file created Įxception in thread 'main' : Java heap spaceĪt ConsumeHeap$BigObject.(ConsumeHeap.java:22) $ java -XX:+HeapDumpOnOutOfMemoryError -mn256m -mx512m ConsumeHeap

#Command line option of openaudible code

Example D-1 Sample Code for Running Out of Memory