IBM User Guide for Java V7 on Windows > Troubleshooting and support > Using diagnostic tools > Using Javadump > Interpreting a Javadump

Javadump tags

The Javadump file contains sections separated by eyecatcher title areas to aid readability of the Javadump.

The first such eyecatcher is shown as follows:

NULL           -------------------------------------------------------------
0SECTION       ENVINFO subcomponent dump routine
NULL           =================================

Different sections contain different tags, which make the file easier to parse for performing simple analysis.

You can also use DTFJ to parse a Javadump, see Using the Diagnostic Tool Framework for Java for more information.

An example tag (1CIJAVAVERSION) is shown as follows:

1CIJAVAVERSION JRE 1.7.0 Windows 7 x86-32 build 20110511_082084 
(pwi3270-20110513_04)

Normal tags have these characteristics:

• Tags are up to 15 characters long (padded with spaces).
• The first digit is a nesting level (0,1,2,3). Nesting levels might be omitted, for example a level 2 tag might be followed by a level 4 tag.
• The second and third characters identify the section of the dump. The major sections are:

  CI

  Command-line interpreter

  CL

  Class loader

  LK

  Locking

  ST

  Storage (The collector and the allocator)

  TI

  Title

  XE

  Execution engine

• The remainder is a unique string, JAVAVERSION in the previous example.

Special tags have these characteristics:

• A tag of NULL means the line is just to aid readability.
• Every section is headed by a tag of 0SECTION with the section title.

Here is an example of some tags taken from the start of a dump. The components are highlighted for clarification.

NULL           ------------------------------------------------------------------
0SECTION       TITLE subcomponent dump routine
NULL           ===============================
1TICHARSET     850
1TISIGINFO     Dump Event "vmstart" (00000001) received
1TIDATETIME    Date: 2011/05/17 at 11:59:50
1TIFILENAME    Javacore filename: C:\test\javacore.20110517.115950.2088.0001.txt
1TIREQFLAGS    Request Flags: 0x81 (exclusive+preempt)
1TIPREPSTATE   Prep State: 0x106 (vm_access+exclusive_vm_access+)
NULL           ------------------------------------------------------------------
0SECTION       GPINFO subcomponent dump routine
NULL           ================================
2XHOSLEVEL     OS Level : Windows 7 6.1 build 7601 Service Pack 1
2XHCPUS        Processors -
3XHCPUARCH       Architecture : x86
3XHNUMCPUS       How Many : 2

Parent: Interpreting a Javadump

Error 404 - Not Found

The document you are looking for may have been removed or re-named. Please contact the web site owner for further assistance.