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My Hudson jobs are crashing on each run with this error:

    Caused by: java.io.IOException: error=12, Not enough space
     at java.lang.UNIXProcess.forkAndExec(Native Method)

I found documention on StackOverflow and on the Jenkins website regarding this error, which indicate a problem of swap space (https://wiki.jenkins-ci.org/display/JENKINS/IOException+Not+enough+space).

However, maybe my problem is different or not, but if I launch the process manually it works fine. A weird thing is I see different resuls from top of from prstat:

Specs:

  • Hudson processes are running in their own Unix user
  • OS: SunOS dc5c00-d12 5.10 Generic_147440-19 sun4v sparc sun4v

  • Memory:

    • from top: 

      32G phys mem, 6255M free mem, 16G total swap, 16G free swap

    • from prstat

      NPROC USERNAME  SWAP   RSS MEMORY      TIME  CPU
50 user1      12G   12G    39%  89:02:31 0.3%
36 user2      11G 6779M    21% 155:17:41 0.0%
26 user3      10G 8509M    26% 4787:37:4 8.0%
 6 hudson    572M  556M   1.7%   0:08:25 0.0%
57 root      280M  285M   0.9% 138:46:05 0.0%

Can anywone confirm if I have a swap issue? top shows 16GB free...

EDIT: results from swap -s (after problem being remporarly resolved)

    total: 19940168k bytes allocated + 12578048k reserved = 32518216k used, 4118208k available

.

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1 回答 1

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这当然是一个交换问题。

top报告为不包含分页数据的空闲交换块。然而，即使在未使用时，这些块中的一些也可以保留（即未触及仍分配的虚拟内存）。当您没有更多的块来支持内存预留时，您会得到这个“空间不足”的异常。

swap -s显示您的应用程序保留了超过 12 GB 的空间，而您的交换区只有 16 GB。我会将您的交换大小加倍，以防止在您的情况下出现虚拟内存短缺。

于 2013-09-09T21:05:18.760 回答