| can MAT use PHD? (or only HPROF?) [message #7112] |
Tue, 18 November 2008 14:18  |
Eclipse User |
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Instructions do not list IBM JRE which we alas must use. (Not my code or
decision ...) Instructions seem to assume (without quite saying so) that
the heap-dump format must be HPROF: what formats are recognized other
than HPROF? In particular, it seems (from "Open heap Dump" -> navigate
to directory full of PHD's) that PHD is not recognized?
On the other hand, I have tried to get the IBM JVM to produce HPROF, so
far to no avail -- does anyone know how to do that?
thanks,
Paul
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| Re: can MAT use PHD? (or only HPROF?) [message #7261 is a reply to message #7136] |
Wed, 19 November 2008 20:40  |
| Eclipse User |
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This is a multi-part message in MIME format.
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Chris Grindstaff wrote:
> You can add an adaptor that allows MAT to read IBM core.*.dmp files.
> "IBM DTFJ adapter for Eclipse Memory Analyzer Tool"
> http://www.ibm.com/developerworks/java/jdk/tools/mat.html
>
OK, that failed. I got the adaptor and created the ".dmp" files, and
when I navigate in MAT (File -> Open Heap Dump) to the directory where
they are, they are visible -- but MAT+DTFJ just immediately barfs; see
attached .log file.
Any other way to get this to work?
-Paul
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Content-Type: text/plain;
name="MAT+DTFJ_Crash.log"
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Content-Disposition: inline;
filename="MAT+DTFJ_Crash.log"
!SESSION 2008-11-19 20:33:31.796 -----------------------------------------------
eclipse.buildId=I20070625-1500
java.fullversion=J2RE 1.5.0 IBM J9 2.3 Windows XP x86-32 j9vmwi3223-20070426 (JIT enabled)
J9VM - 20070420_12448_lHdSMR
JIT - 20070419_1806_r8
GC - 200704_19
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Command-line arguments: -os win32 -ws win32 -arch x86
!ENTRY org.eclipse.mat.parser 4 0 2008-11-19 20:33:52.359
!MESSAGE Error opening heap dump
!SUBENTRY 1 org.eclipse.mat.parser 4 0 2008-11-19 20:33:52.359
!MESSAGE Unable to read dump in either IBM Java 6, IBM Java 5.0 or IBM Java 1.4.2 formats
!STACK 0
java.io.IOException: Unable to read dump in either IBM Java 6, IBM Java 5.0 or IBM Java 1.4.2 formats
at org.eclipse.mat.dtfj.DTFJIndexBuilder.getUncachedDump(DTFJIn dexBuilder.java:3871)
at org.eclipse.mat.dtfj.DTFJIndexBuilder.getDump(DTFJIndexBuild er.java:3752)
at org.eclipse.mat.dtfj.DTFJIndexBuilder.fill(DTFJIndexBuilder. java:284)
at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(Sn apshotFactoryImpl.java:183)
at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnap shot(SnapshotFactoryImpl.java:101)
at org.eclipse.mat.snapshot.SnapshotFactory.openSnapshot(Snapsh otFactory.java:87)
at org.eclipse.mat.ui.snapshot.ParseHeapDumpJob.run(ParseHeapDu mpJob.java:54)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: java.io.IOException: Currently can only handle SDFF files, which _MUST have a suffix of ".sdff"_
or svcdumps
at com.ibm.dtfj.image.sov.ImageFactory.getImage(ImageFactory.ja va:99)
at com.ibm.dtfj.image.sov.ImageFactory.getImage(ImageFactory.ja va:169)
at org.eclipse.mat.dtfj.DTFJIndexBuilder.getUncachedDump(DTFJIn dexBuilder.java:3860)
... 7 more
!ENTRY org.eclipse.mat.ui 4 0 2008-11-19 20:33:52.375
!MESSAGE Error opening heap dump 'core.20081120.012103.1220.dmp'. Check log for details.
!STACK 0
org.eclipse.mat.SnapshotException: Error opening heap dump 'core.20081120.012103.1220.dmp'. Check log for details.
at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(Sn apshotFactoryImpl.java:217)
at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnap shot(SnapshotFactoryImpl.java:101)
at org.eclipse.mat.snapshot.SnapshotFactory.openSnapshot(Snapsh otFactory.java:87)
at org.eclipse.mat.ui.snapshot.ParseHeapDumpJob.run(ParseHeapDu mpJob.java:54)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
--------------030802080004040404060801--
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| Re: can MAT use PHD? (or only HPROF?) [message #7655 is a reply to message #7545] |
Thu, 20 November 2008 09:40 |
| Eclipse User |
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Andreas Buchen wrote:
> I know that the DTFJ adapter requires the exact SR or the Java VM.
> Currently, one has to at least have one of those:
> IBM JDK 1.4.2 SR12, 5.0 SR8a and 6.0 SR2
> (The java full version string in the log file indicates a older version).
>
Hmm, interesting -- I thought I had gotten a more recent one, but now
that I think it through, the JVM in use was actually provided by another
team member ...
> The next thing to do is to run ~/jre/bin/jextract on the dump. The
> jextract must be the one from the VM you got the heap dump from. From
> that platform.
>
> Then you can open the dump in MAT.
>
Aha! That was the missing step; it is in the DTFJ instructions (now that
I know what to look for), but not clearly enough for me to get it on the
first read through.
Now MAT is happy and so am I (but the same team member who supplied the
out-of-date JVM will not be; just spotted what looks to be a
magnificently huge leak in his code ...)
thanks,
-Paul
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