jrockit.<pid>.dump
and jrockit.<pid>.mdmp/core
, where pid is the process id that appears as a number, for example, jrockit.72.dump
. dump
file is information about the JVM at the point of time for the crash. This information can give hints and leads to why the JVM has crashed. See Listing 31-1 through Listing 31-4 for an example of the information contained in a text dump
file. The text dump
file can be viewed in a regular text editor. To turn the creation of the text dump
file off, see Disabling Text dump Files. core
or mdmp
crash file contains information about the entire JRockit JVM process and needs to be opened in a debugger. The size of the binary crash file is usually quite large, so you need to make sure there is enough disk space for the file to be completely written to disk. By default, the JVM records a full binary crash file. To set the size of the binary crash file, see Binary Crash File Sizing. To turn the creation of the binary crash file off, see Disabling the Binary Crash Files. core
or mdmp
crash files vary tremendously. The text dump
file is normally a very small file, usually under 100kB. The binary crash files, on the other hand, are, by default, set to log the entire JRockit JVM process (see Figure 31-2) and therefore become very large, which demands greater storage capacity on your system. -XXdumpSize.
The default setting is -XXdumpSize:large
. A large dump contains the entire JVM process including the Java heap. While small
and normal
settings are also available, neither of these sizes are adequate for troubleshooting a JVM crash since the Java heap is excluded. -XXdumpSize:none
. For more information on this option, see -XXdumpSize in the Oracle JRockit JVM Command-Line Reference. Note: | Remember that you need to provide a <large> binary core or mdmp crash file with any problem that you submit to the Oracle JRockit support organization. |
dump
files are saved to your current working directory (see Enabling Binary core Crash Files on Linux and Sun Solaris). If you want to save the crash files in a different location, use the environment variable JROCKIT_DUMP_PATH
and specify where you want the information located. The path that you specify must exist and be writable. ulimit
-c
<value>
to something greater than zero, for example, ulimit -c unlimited
. This value is measured in blocks, with each block equaling one kilobyte. You can set the value from either the command line or in a shell script. To disable crash files on Linux and Solaris, set ulimit -c 0
. core
crash file, enter the following: Jennings compound bow manual.mdmp
files are always created on Windows. If you do not specify the variable JROCKIT_DUMP_PATH
, the crash files end up in the current directory (the directory from where you start the JVM). dump
file is a small and good source of information to get an initial grasp of what has gone wrong with the JVM and the binary core
or mdmp
crash file is essential when creating a support case for the Oracle JRockit support organization. dump
files you can turn off the text dump
file by using the option: -XXnoJrDump.
-XXdumpSize:none
. dump
file is a good source of initial troubleshooting information to help you identify the problem. dump
file will not necessarily tell you exactly why the crash occurred, but it describes the environment where the JRockit JVM was running and the state of the JVM when the crash occurred. This gives some hints on where to start looking and can give an idea of the crash type. There are however some easily identified symptoms that you can look for in the dump
file: StackOverFlow
field in the dump
file. If this field indicates that stack overflow errors have occurred, the crash is likely to have been caused by a stack overflow. See Stack Overflow Crash for information on how to deal with stack overflow crashes.Stack Overflow
in the Error message
field or in the stack trace near the bottom of the dump
file. Such occurrences may also indicate a stack overflow. See Stack Overflow Crash for information on how to deal with stack overflow crashes.C Heap
field in the dump
file. If this field indicates that memory allocations have failed, the process may have run out of virtual memory. See Out Of Virtual Memory Crash for information on how to deal with out of virtual memory errors.LD_ASSUME_KERNEL
field in the dump
file. Having this Linux-specific environment variable set usually leads to the JRockit JVM using unsupported system libraries and becoming unstable. See Unsupported Linux Configuration Crash for information on dealing with unsupported Linux configuration problems.dump
file you can try troubleshooting further using the information in JVM Crash or open a support case. To open a support case you must have a service agreement with Oracle. dump
file might look like and explains the parts of the dump
file. The text dump
file that has been used in this example is a combination of many different dump
files, so that more crash scenarios can be covered. dump
file. Hd nature wallpaper for mac.dump
file. This section contains information about when the crash occurred and for how long the JVM has been running. The file locations refer to the location of both text and binary crash files. jrockit.developer.interest.general
. Posting your problem on the forum is no guarantee to get it resolved, but the forum is a good source for information on JRockit JVM problems. mmStartCompaction
and mmEndCompaction
values are a description of where in the heap the compaction of the heap has taken place during the current or latest garbage collection. Command Line
. -Xgc:gencon
), with an initial minimum and maximum Java heap (-Xms
and -Xmx
), and a nursery size setting (-Xns
). JAVA_HOME
is the path to your Java home catalog; that is, where the JRockit JVM is installed. _JAVA_OPTIONS
is a list of command line options that will be automatically passed to all newly started JRockit JVMs. LD_LIBRARY_PATH
is a Linux /Solaris specific environment variable that can make the JRockit JVM find libraries other than the default system libraries. Sometimes, you need to set this variable for running JNI code. You can set this variable so that the JVM starts using unsupported libraries on otherwise supported platforms. LD_ASSUME_KERNEL
Play chess serial number crack software. lists information of what might have gone wrong prior to the crash. See Symptoms to Look For for more information on what to look for in these fields. Registers
. dump
file itself is incorrect. unreadable
” instead of showing numbers, the crash is probably due to stack overflow. https://andy-timmons-tab-book-pdf02.peatix.com. The Stack information section is usually much longer than the one shown in Listing 31-3. © BEA Systems |