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https://issues.apache.org/jira/browse/ZOOKEEPER-1474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13529335#comment-13529335
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Nikita Vetoshkin commented on ZOOKEEPER-1474:
---------------------------------------------
Took a look at this one and came with a better implementation.
Spawning new {{bash}} process is a heavyweight operation (compared to a few fs
system calls) especially if it's a huge server process:
* although linux uses copy-on-write during {{fork}} it's still an expensive
operation because it needs to create new process and walk through all memory
pages to mark them as readonly
* despite of linux overcommit feature we can receive {{ENOMEM}} if host is
running out of RAM
I'm attaching new patch, which is simplier. Please, take a look. Maybe it lacks
comments, but works.
> Cannot build Zookeeper with IBM Java: use of Sun MXBean classes
> ---------------------------------------------------------------
>
> Key: ZOOKEEPER-1474
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1474
> Project: ZooKeeper
> Issue Type: Bug
> Components: build
> Affects Versions: 3.4.0, 3.4.3, 3.4.4, 3.4.5
> Reporter: Adalberto Medeiros
> Assignee: Paulo Ricardo Paz Vital
> Labels: build
> Fix For: 3.5.0, 3.4.6
>
> Attachments: don_t_use_bash_to_get_stats.patch, zookeeper-1474.patch,
> zookeeper-1474-v2.patch, zookeeper-1474-v3.patch, ZOOKEEPER-1474-v4.patch,
> ZOOKEEPER-1474-v5.patch, ZOOKEEPER-1474-v6.patch
>
>
> zookeeper.server.NIOServerCnxn and zookeeper.server.NettyServerCnxn imports
> com.sun.management.UnixOperatingSystemMXBean . This OperatingSystemMXBean
> class is not implemented by IBM or open java.
> In my case, I need IBM Java so I can run zookeeper in Power ppc64 servers.
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