APAR status
Closed as program error.
Error description
Error Message: Using jdmpview to read a large SVCDUMP direct from an MVS dataset is very slow, typically taking more than 30 minutes elapsed time to open a 6Gb SVCDUMP. . Stack Trace: 4XESTACKTRACE at com/ibm/jzos/ZFile.fseeko(Native Method) 4XESTACKTRACE at com/ibm/jzos/ZFile.seek(ZFile.java:1447(Compiled Code)) 4XESTACKTRACE at com/ibm/j9ddr/corereaders/tdump/zebedee/dumpreader/Dump$Rarf.rea d(Dump.java:681(Compiled Code)) 4XESTACKTRACE at com/ibm/j9ddr/corereaders/tdump/zebedee/dumpreader/Dump.read(Dum p.java:438(Compiled Code)) 4XESTACKTRACE at javax/imageio/stream/ImageInputStreamImpl.readFully(ImageInputSt reamImpl.java:362(Compiled Code)) 4XESTACKTRACE at javax/imageio/stream/ImageInputStreamImpl.readFully(ImageInputSt reamImpl.java:372(Compiled Code)) 4XESTACKTRACE at com/ibm/j9ddr/corereaders/tdump/zebedee/dumpreader/Dump.initiali ze(Dump.java:311(Compiled Code)) 4XESTACKTRACE at com/ibm/j9ddr/corereaders/tdump/zebedee/dumpreader/Dump.<init>(D ump.java:194) 4XESTACKTRACE at com/ibm/j9ddr/corereaders/tdump/zebedee/dumpreader/Dump.<init>(D ump.java:136) 4XESTACKTRACE at com/ibm/j9ddr/corereaders/tdump/TDumpReader.processDump(TDumpRea der.java:97) 4XESTACKTRACE at com/ibm/j9ddr/corereaders/CoreReader.readCoreFile(CoreReader.jav a:82) 4XESTACKTRACE at com/ibm/j9ddr/view/dtfj/image/J9DDRImageFactory.getImage(J9DDRIm ageFactory.java:114) 4XESTACKTRACE at com/ibm/dtfj/image/j9/ImageFactory.foundImage(ImageFactory.java: 357) 4XESTACKTRACE at com/ibm/dtfj/image/j9/ImageFactory.getImage(ImageFactory.java:19 1) 4XESTACKTRACE at com/ibm/jvm/dtfjview/commands/OpenCommand.imagesFromCommandLine( OpenCommand.java:102) 4XESTACKTRACE at com/ibm/jvm/dtfjview/commands/OpenCommand.run(OpenCommand.java:7 0) 4XESTACKTRACE at com/ibm/java/diagnostics/utils/Context.tryCommand(Context.java:1 30) 4XESTACKTRACE at com/ibm/java/diagnostics/utils/Context.execute(Context.java:86) 4XESTACKTRACE at com/ibm/jvm/dtfjview/CombinedContext.execute(CombinedContext.jav a:162) 4XESTACKTRACE at com/ibm/jvm/dtfjview/CombinedContext.execute(CombinedContext.jav a:146) 4XESTACKTRACE at com/ibm/jvm/dtfjview/Session.imageFromCommandLine(Session.java:5 82) 4XESTACKTRACE at com/ibm/jvm/dtfjview/Session.sessionInit(Session.java:194) 4XESTACKTRACE at com/ibm/jvm/dtfjview/Session.<init>(Session.java:154) 4XESTACKTRACE at com/ibm/jvm/dtfjview/Session.getInstance(Session.java:150) 4XESTACKTRACE at com/ibm/jvm/dtfjview/DTFJView.launch(DTFJView.java:39) 4XESTACKTRACE at com/ibm/jvm/dtfjview/DTFJView.main(DTFJView.java:34) . A call stack obtained using Health Centre or by generating a Java dump (javacore) shows that the jdmpview code is spending most of its time in JZOS file seek() or read() operations.
Local fix
If disk space allows, copy or move the SVCDUMP to an HFS file system before opening it in jdmpview.
Problem summary
The problem is caused when jdmpview is reading an SVCDUMP dataset using the JZOS APIs.
Problem conclusion
The jdmpview code has been updated to read SVCDUMP datasets in a more efficient way. . This APAR will be fixed in the following Java Releases: 7 R1 SR3 FP10 (7.1.3.10) 6 R1 SR8 FP7 (6.1.8.7) 8 SR1 FP10 (8.0.1.10) 7 SR9 FP 10 (7.0.9.10) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the available Service Refreshes and Fix Packs can be found at: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IV73609
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
270
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-05-27
Closed date
2015-05-27
Last modified date
2015-06-29
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
J9 COMMON CODE
Fixed component ID
620700127
Applicable component levels
R270 PSY
UP
R260 PSY
UP
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Document Information
Modified date:
22 February 2022