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POHow to solve "java.io.IOException: error=12, Cannot allocate memory" calling Runtime#exec()?
 

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  1. POHow to solve "java.io.IOException: error=12, Cannot allocate memory" calling Runtime#exec()?
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    <p>On my system I can't run a simple Java application that start a process. I don't know how to solve. </p> <p>Could you give me some hints how to solve?</p> <p>The program is:</p> <pre><code>[root@newton sisma-acquirer]# cat prova.java import java.io.IOException; public class prova { public static void main(String[] args) throws IOException { Runtime.getRuntime().exec("ls"); } } </code></pre> <p>The result is:</p> <pre><code>[root@newton sisma-acquirer]# javac prova.java &amp;&amp; java -cp . prova Exception in thread "main" java.io.IOException: Cannot run program "ls": java.io.IOException: error=12, Cannot allocate memory at java.lang.ProcessBuilder.start(ProcessBuilder.java:474) at java.lang.Runtime.exec(Runtime.java:610) at java.lang.Runtime.exec(Runtime.java:448) at java.lang.Runtime.exec(Runtime.java:345) at prova.main(prova.java:6) Caused by: java.io.IOException: java.io.IOException: error=12, Cannot allocate memory at java.lang.UNIXProcess.&lt;init&gt;(UNIXProcess.java:164) at java.lang.ProcessImpl.start(ProcessImpl.java:81) at java.lang.ProcessBuilder.start(ProcessBuilder.java:467) ... 4 more </code></pre> <p>Configuration of the system:</p> <pre><code>[root@newton sisma-acquirer]# java -version java version "1.6.0_0" OpenJDK Runtime Environment (IcedTea6 1.5) (fedora-18.b16.fc10-i386) OpenJDK Client VM (build 14.0-b15, mixed mode) [root@newton sisma-acquirer]# cat /etc/fedora-release Fedora release 10 (Cambridge) </code></pre> <p><strong>EDIT: Solution</strong> This solves my problem, I don't know exactly why:</p> <p>echo 0 > /proc/sys/vm/overcommit_memory</p> <p>Up-votes for who is able to explain :)</p> <p>Additional informations, top output: </p> <pre><code>top - 13:35:38 up 40 min, 2 users, load average: 0.43, 0.19, 0.12 Tasks: 129 total, 1 running, 128 sleeping, 0 stopped, 0 zombie Cpu(s): 1.5%us, 0.5%sy, 0.0%ni, 94.8%id, 3.2%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1033456k total, 587672k used, 445784k free, 51672k buffers Swap: 2031608k total, 0k used, 2031608k free, 188108k cached </code></pre> <p>Additional informations, free output: </p> <pre><code>[root@newton sisma-acquirer]# free total used free shared buffers cached Mem: 1033456 588548 444908 0 51704 188292 -/+ buffers/cache: 348552 684904 Swap: 2031608 0 2031608 </code></pre>
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    1. USAndrew Thompson
    1. USAndrea Francia
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      1. POHow to solve "java.io.IOException: error=12, Cannot allocate memory" calling Runtime#exec()?
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    1. COIt's either a bug in the linux version or you have some privilege issues. You could look into the UnixProcess:164 in the source to find out what it tries to allocate.
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      1. USakarnokd
    2. COYou can always try the sun jdk
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      1. POHow to solve "java.io.IOException: error=12, Cannot allocate memory" calling Runtime#exec()?
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    3. COI had posted a link to a free library that solves your problem but a moderator deleted my answer without explanation. To the benefit of the community, I give it another try as comment: Your memory problem is solved by Yajsw which on Linux uses calls to a C library for the process creation. Read about it here: http://sourceforge.net/projects/yajsw/forums/forum/810311/topic/4423982
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