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From "Mladen Turk (JIRA)" <>
Subject [jira] [Commented] (DAEMON-270) JSVC process capability issue
Date Thu, 06 Dec 2012 12:56:59 GMT


Mladen Turk commented on DAEMON-270:

I'm not sure why would that be a bad thing and why would that be a major issue.
>From your comment it is clear that if you set user's 'ulimit -u unlimited' it'll work.
Anyhow, it can just be a bug in the linux kernel.

> JSVC process capability issue
> -----------------------------
>                 Key: DAEMON-270
>                 URL:
>             Project: Commons Daemon
>          Issue Type: Bug
>          Components: Jsvc
>    Affects Versions: 1.0.11
>         Environment: Linux centos 6.3, jdk1.7, tomcat 
>            Reporter: Raintung Li
> For jsvc, start fork process to start JVM, then downgrade the process capability to 0.
> Is it really requirement? or any concern? 
> For my test env, it happen can't start more threads in the java.
> After the check, it is limited by "ulimit -u" max process for user. It is very interesting
things, actually it doesn't control threads by this attribute in the normal process.
> Downgrade the process capability cause this issue. Max threads number should be control
by env memory, kernel max threads parameter, stack size.
> For my suggestion, could remove downgrade the process capability, only inherit the parent's
process capability and add some "read/netbind/setuid.." extra privilege if don't have.

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