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POJava process dies "Out of swap space" during major GC, with plenty of memory left on machine
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  1. POJava process dies "Out of swap space" during major GC, with plenty of memory left on machine
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    copied!<p>So I was monitoring a process using VisualVM and I clicked on "Perform GC", the process then died with error:</p> <pre><code># # A fatal error has been detected by the Java Runtime Environment: # # java.lang.OutOfMemoryError: requested 4088 bytes for char in /BUILD_AREA/jdk6_24/hotspot/src/share/vm/utilities/stack.inline.hpp. Out of swap space? # # Internal Error (allocation.inline.hpp:39), pid=1148, tid=1082808672 # Error: char in /BUILD_AREA/jdk6_24/hotspot/src/share/vm/utilities/stack.inline.hpp # # JRE version: 6.0_24-b07 # Java VM: Java HotSpot(TM) 64-Bit Server VM (19.1-b02 mixed mode linux-amd64 ) # An error report file with more information is saved as: # /net/bsrs78.pit.twosigma.com/d-1/local/eaMemory2-yao-bsrs78.pit.twosigma.com-db8rsnyc9-head-20110622-130721-31729-0/hs_err_pid1148.log # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp # </code></pre> <p>But not long before I did that, I checked the machine and it seems like there's plenty of memory left (numbers shown in MB):</p> <pre><code>free -m total used free shared buffers cached Mem: 96869 60999 35869 0 363 4590 -/+ buffers/cache: 56045 40823 Swap: 10243 40 10203 </code></pre> <p>It doesn't seem likely to me that GC will take up all the memory.</p> <p>This is a problem because if I just let the program continue to run, at some point it will max out its allocated heap and then try to do a major GC and die the same way. Minor GC seems fine though. </p> <p>So what is going on here? Why does it die with the swap space message? Please let me know if there's anything I can do to provide more information or diagnose this problem further. I will greatly appreciate all help!</p> <p>Thanks!</p> <p>Edit1: I've uploaded the error log at <a href="http://www.mediafire.com/?kw0meup9mw5de9c" rel="nofollow">http://www.mediafire.com/?kw0meup9mw5de9c</a>, and for what it's worth, it's using PS Scavenge for minor GC and PS MarkSweep for major GC.</p> <p>Edit2: Also, this problem has happened multiple times, consistently dying in the middle of a major garbage collection -- whether induced by me via visualVM or running out of heap and being triggered by jvm itself.</p>
 

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