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Re: [mat-dev] java.io.FileNotFoundException: /mat-work/nikhil/MAT1.11/mat/../../sacbay-m-big77GB.inbound.index3096.log (Too many open files)
Here are some more details 
Please find the command ulimit -a output below :

[opc@ci-iad-mat-lab-01 mat]$ ulimit -a

core file size          (blocks, -c) 0

data seg size           (kbytes, -d) unlimited

scheduling priority             (-e) 0

file size               (blocks, -f) unlimited

pending signals                 (-i) 239754

max locked memory       (kbytes, -l) 64

max memory size         (kbytes, -m) unlimited

open files                      (-n) 1024

pipe size            (512 bytes, -p) 8

POSIX message queues     (bytes, -q) 819200

real-time priority              (-r) 0

stack size              (kbytes, -s) 8192

cpu time               (seconds, -t) unlimited

max user processes              (-u) 4096

virtual memory          (kbytes, -v) unlimited

file locks                      (-x) unlimited

[opc@ci-iad-mat-lab-01 mat]$ 


Hprof file size is : 77GB


MAT version : 1.11


And its failing after this step  "Re-indexing outbound index"


[Task: Parsing /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.hprof

[

Subtask: Scanning /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.hprof

[....................

[INFO] Wrote threads call stacks to /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.threads

[....................

[INFO] Heap /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.hprof contains 1,168,946,725 objects

[....................

Subtask: Extracting objects from /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.hprof

[................................................................................Task: Removing unreachable objects

[

Subtask: Searching for unreachable objects

[

Subtask: Marking reachable objects

[.

Subtask: Re-indexing objects

[.

[INFO] Removed 72,901,319 unreachable objects using 6,692,864,976 bytes

[..

Subtask: Re-indexing classes

[...

Subtask: Writing /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.idx.index

[....

Subtask: Writing /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.o2c.index

[.....

Subtask: Writing /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.a2s.index

[......

Subtask: Re-indexing outbound index

[......]


eclipse.buildId=unknown

java.version=1.8.0_292

java.vendor=Red Hat, Inc.

BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US

Framework arguments:  -application org.eclipse.mat.api.parse -DhprofStrictnessWarning=true ../../sacbay-m-big77GB.hprof org.eclipse.mat.api:suspects org.eclipse.mat.api:top_components org.eclipse.mat.api:overview

Command-line arguments:  -os linux -ws gtk -arch x86_64 -consolelog -application org.eclipse.mat.api.parse -DhprofStrictnessWarning=true ../../sacbay-m-big77GB.hprof org.eclipse.mat.api:suspects org.eclipse.mat.api:top_components org.eclipse.mat.api:overview


!ENTRY org.eclipse.osgi 4 0 2021-07-07 05:32:46.312

!MESSAGE Application error

!STACK 1

org.eclipse.mat.SnapshotException: Error opening heap dump 'sacbay-m-big77GB.hprof'. Check the error log for further details.

at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(SnapshotFactoryImpl.java:331)

at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnapshot(SnapshotFactoryImpl.java:167)

at org.eclipse.mat.snapshot.SnapshotFactory.openSnapshot(SnapshotFactory.java:147)

at org.eclipse.mat.internal.apps.ParseSnapshotApp.parse(ParseSnapshotApp.java:138)

at org.eclipse.mat.internal.apps.ParseSnapshotApp.start(ParseSnapshotApp.java:110)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594)

at org.eclipse.equinox.launcher.Main.run(Main.java:1447)

at org.eclipse.equinox.launcher.Main.main(Main.java:1420)

Caused by: java.io.FileNotFoundException: /mat-work/nikhil/MAT1.11_Normal/mat/../../sacbay-m-big77GB.inbound.index3096.log (Too many open files)

at java.io.FileOutputStream.open0(Native Method)

at java.io.FileOutputStream.open(FileOutputStream.java:270)

at java.io.FileOutputStream.<init>(FileOutputStream.java:213)

at java.io.FileOutputStream.<init>(FileOutputStream.java:162)

at org.eclipse.mat.parser.index.IndexWriter$InboundWriter.log(IndexWriter.java:1237)

at org.eclipse.mat.parser.internal.GarbageCleaner.clean(GarbageCleaner.java:360)

at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(SnapshotFactoryImpl.java:282)

... 17 more




On Wed, Jul 7, 2021 at 9:03 AM Nikhil Dongre <nikhil.vilas@xxxxxxxxx> wrote:
Hi Kevin,

Thanks for the quick response.

Please find the command output below :

[opc@ci-iad-mat-lab-01 mat]$ ulimit -a

core file size          (blocks, -c) 0

data seg size           (kbytes, -d) unlimited

scheduling priority             (-e) 0

file size               (blocks, -f) unlimited

pending signals                 (-i) 239754

max locked memory       (kbytes, -l) 64

max memory size         (kbytes, -m) unlimited

open files                      (-n) 1024

pipe size            (512 bytes, -p) 8

POSIX message queues     (bytes, -q) 819200

real-time priority              (-r) 0

stack size              (kbytes, -s) 8192

cpu time               (seconds, -t) unlimited

max user processes              (-u) 4096

virtual memory          (kbytes, -v) unlimited

file locks                      (-x) unlimited

[opc@ci-iad-mat-lab-01 mat]$ 


Regards

Nikhil Dongre




On Wed, Jul 7, 2021 at 8:52 AM Kevin Grigorenko <kevin.grigorenko@xxxxxxxxxx> wrote:
The error "Too many open files" may occur because your file ulimit is too small, system-wide limits have been exceeded, or there is a bug in MAT creating too many file descriptors (in decreasing order of probability). Please start a terminal and send the output of the following command:

$ ulimit -a

--
Kevin Grigorenko
IBM App Platform SWAT




From:        "Nikhil Dongre" <nikhil.vilas@xxxxxxxxx>
To:        mat-dev@xxxxxxxxxxx
Date:        07/06/2021 06:01 PM
Subject:        [EXTERNAL] [mat-dev] java.io.FileNotFoundException: /mat-work/nikhil/MAT1.11/mat/../../sacbay-m-big77GB.inbound.index3096.log (Too many open files)
Sent by:        "mat-dev" <mat-dev-bounces@xxxxxxxxxxx>



Hi Team, When i tried to process process gz hprof file i got this exception  org.eclipse.mat.SnapshotException: Error opening heap dump 'sacbay-m-big77GB.hprof.gz'. Check the error log for further details. at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(SnapshotFactoryImpl.java:331)
Hi Team,

When i tried to process process gz hprof file i got this exception 

org.eclipse.mat.SnapshotException: Error opening heap dump 'sacbay-m-big77GB.hprof.gz'. Check the error log for further details.

at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(SnapshotFactoryImpl.java:331)

at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnapshot(SnapshotFactoryImpl.java:167)

at org.eclipse.mat.snapshot.SnapshotFactory.openSnapshot(SnapshotFactory.java:147)

at org.eclipse.mat.internal.apps.ParseSnapshotApp.parse(ParseSnapshotApp.java:138)

at org.eclipse.mat.internal.apps.ParseSnapshotApp.start(ParseSnapshotApp.java:110)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594)

at org.eclipse.equinox.launcher.Main.run(Main.java:1447)

at org.eclipse.equinox.launcher.Main.main(Main.java:1420)

Caused by: java.io.FileNotFoundException: /mat-work/nikhil/MAT1.11/mat/../../sacbay-m-big77GB.inbound.index3096.log (Too many open files)

at java.io.FileOutputStream.open0(Native Method)

at java.io.FileOutputStream.open(FileOutputStream.java:270)

at java.io.FileOutputStream.<init>(FileOutputStream.java:213)

at java.io.FileOutputStream.<init>(FileOutputStream.java:162)

at org.eclipse.mat.parser.index.IndexWriter$InboundWriter.log(IndexWriter.java:1237)

at org.eclipse.mat.parser.internal.GarbageCleaner.clean(GarbageCleaner.java:360)

at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(SnapshotFactoryImpl.java:282)

... 17 more

MemoryAnalyzer:

An error has occurred. See the log file_______________________________________________
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