The Web Cache instance is out of service every hour

Hello
I have 11.1.0.1 on Solaris 10 SPARC EM grid control. All the patches in the applied SGD.
I have problem with monitoring application 10.1.0.1 on Solaris 10 x 86 Server. Agent 11.1.0.1.
emagent.TRC:
2011-01-11 10:27:57, 745 ERROR Thread-440 engine: [Cache oracle_webcache, reports.sun - rep_Web, ESI_HIST]: nmeegd_GetMetricData failed: java.lang.NullPointerException
2011-01-11 10:27:57, collector of Thread - 440 WARN 745: < nmecmc.c > output error. Error: java.lang.NullPointerException

I get alerts every hour with "the Web Cache instance is down".
Help, please.

If the agent gets really restarted several times a day (every hour for example) which is certainly not expected behavior...

I found this - perhaps it helps:
(you should check your mentioned errors log files)

The 11g EM Agent restarts at frequent intervals with the following entries in the /sysman/log/emagent.nohup file of

emagent started successfully
URLTiming: Using SunX509
Exception in thread "oracle.dms.collector.GatherThread@15000".
java.util.ConcurrentModificationException
to java.util.HashMap$ HashIterator.nextEntry (HashMap.java:793)
to java.util.HashMap$ EntryIterator.next (HashMap.java:834)
to java.util.HashMap$ EntryIterator.next (HashMap.java:832)
at oracle.dms.collector.Gatherer.cleanup(Gatherer.java:235)
at oracle.dms.collector.GatherThread.run(GatherThread.java:85)
-Recycling process. VMSize is 6385.46875 MB increased 6327.09375 MB
past 3 -.
-Thu Jul 15 02:14:08 2010::Received asks to restart EMAgent: 12200
-----
-Thu Jul 15 02:14:08 2010::Stopping EMAgent: 12200 -.
(pid = 12200): emagent now go out normally

The new start above occurs when the virtual memory consumed by the Agent have crossed the line and that's why he is automatically restarted by the daemon process.

-The /sysman/log/emagent_fetchlet.trc also shows a lot of errors related to the JNIFetchlet:

[nmefmgr_getJNIFetchlet] Warn emd.fetchlets getMetric.387 - oracle.sysman.emSDK.emd.fetchlet.FetchletException:
oracle.sysman.emSDK.emd.fetchlet.FetchletException: java.io.IOException:
Cannot connect to any host
oracle.sysman.emSDK.emd.fetchlet.FetchletException:
oracle.sysman.emSDK.emd.fetchlet.FetchletException: java.io.IOException:
Cannot connect to any host
to
..............
[nmefmgr_getJNIFetchlet] WARN JMX.generic logp.251 - IOException: can not connect to the target with
serviceURL=service:jmx:t3s://agentmachine.domain:7101/jndi/weblogic.management.mbeanservers.runtime for weblogic_j2eeserver:server metric:
Unable to connect to any host Cause: javax.naming.NamingException: unable to connect to any host [root exception is org.omg.CORBA.COMM_FAILURE: vmcid:]
[Minor SUN code: 203 out: No.]

-Historical data for the "use of memory resident (%) 'or' memory use virtual growth (%) ' parameters for this Agent show large memory
use over the period, when the Agent has increased.
These details are accessible from the configuration of Console grid-> Agents-> click on the name of the Agent-> click on 'All settings'-> Expand ' Agent process
Statistics-> click on the "use of memory resident (%) 'or' memory use virtual growth (%) '.

Cause
This issue has been studied in the Bug 9829732: AREA of SGD AGENT 11.1.0.1 RUNNING ON CONSUMED the UPPER MEMORY

Using pmap to check the memory usage:

$ ps - ef | grep agent11g
PMAP $

Returns a result as below:

....
00002aaab32e0000 rwx 21248-[anon]
00002aaab47a0000 rwx 64768-[anon]
00002aaab86e0000 125632 rwx-[anon]
00002aaac0190000 1884160 rwx-[anon]
00002aab33190000 rwx 62784-[anon]
00002aab36ee0000 942080 rwx-[anon]
.....

It was found that the majority of virtual memory has been consumed by these [anon] blocks.

It was found that the memory of Java used by the Agent when using JNI calls must be tuned. This may be necessary when the large number of "java" such as Weblogic servers targets is monitored by the Agent.

Tags: Enterprise Manager

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