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https://issues.apache.org/jira/browse/SOLR-4526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592597#comment-13592597
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Shawn Heisey commented on SOLR-4526:
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Additional note from the user on IRC: I adjusted the live server config to run
the solr built-in jetty and now all the stats are showing up, even on openjdk,
so the issue seems to be with older jetty versions.
> Admin UI dependence on UnixOperationSystemMXBean
> ------------------------------------------------
>
> Key: SOLR-4526
> URL: https://issues.apache.org/jira/browse/SOLR-4526
> Project: Solr
> Issue Type: Bug
> Components: web gui
> Affects Versions: 4.1
> Environment: Oracle Corporation OpenJDK 64-Bit Server VM (1.7.0_15
> 23.7-b01)
> Reporter: Shawn Heisey
>
> A user on IRC was having trouble getting file descriptor counts and JVM
> memory usage in the admin UI, but it worked perfectly fine on another system.
> The problem system uses OpenJDK, the other one uses the Apple JDK. The user
> had tracked it down to an exception while trying to get open file descriptor
> info.
> Looking in the SystemInfoHandler.java file, I see a comment reference to
> com.sun.management.UnixOperatingSystemMXBean at the point where it is getting
> file descriptor info. A little extra searching turned up ZOOKEEPER-1579
> which refers to HBASE-6945, the same problem with OpenJDK.
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