Is this related? http://stackoverflow.com/questions/1124771/how-to-solve-java-io-ioexception-error-12-cannot-allocate-memory-calling-run
On Wed, Aug 1, 2012 at 1:33 PM, Keith Wiley <kwi...@keithwiley.com> wrote: > I know there is a lot of discussion about JVM reuse in Hadoop, but that > usually refers to mappers running on the cluste nodesr. I have a much > different question. I am running a Java program which at one point execs > hadoop and that call sometimes fails in the fashion shown below. Thus, > this issue occurs entirely within the client machine (of course, I am > currently running in pseudo-distributed mode which convolutes that point > somewhat). In other words, I successfully ran a Java program, but it > failed to subsequently run *another* Java program (hadoop). My > interpretation of the hadoop startup scripts (the hadoop command itself for > example) is that they run a second JVM in my scenario, and that they fail > to allocate enough memory. > > Is there any way to run hadoop from within a JVM such that it reuses the > local JVM? > > EXCEPTION: java.io.IOException: Cannot run program "hadoop": > java.io.IOException: error=12, Cannot allocate memory > java.lang.ProcessBuilder.start(ProcessBuilder.java:460) > java.lang.Runtime.exec(Runtime.java:593) > java.lang.Runtime.exec(Runtime.java:466) > com.util.Shell.run(Shell.java:44) > com.exe.Foo.bar(Foo.java:107) > com.exe.Foo.run(Foo.java:205) > com.exe.Foo.main(Foo.java:227) > Exception in thread "main" java.io.IOException: Cannot run program > "hadoop": java.io.IOException: error=12, Cannot allocate memory > at java.lang.ProcessBuilder.start(ProcessBuilder.java:460) > at java.lang.Runtime.exec(Runtime.java:593) > at java.lang.Runtime.exec(Runtime.java:466) > at com.util.Shell.run(Shell.java:44) > at com.exe.Foo.bar(Foo.java:107) > at com.exe.Foo.run(Foo.java:205) > at com.exe.Foo.main(Foo.java:227) > Caused by: java.io.IOException: java.io.IOException: error=12, Cannot > allocate memory > at java.lang.UNIXProcess.<init>(UNIXProcess.java:148) > at java.lang.ProcessImpl.start(ProcessImpl.java:65) > at java.lang.ProcessBuilder.start(ProcessBuilder.java:453) > ... 6 more > > > ________________________________________________________________________________ > Keith Wiley kwi...@keithwiley.com keithwiley.com > music.keithwiley.com > > "You can scratch an itch, but you can't itch a scratch. Furthermore, an > itch can > itch but a scratch can't scratch. Finally, a scratch can itch, but an itch > can't > scratch. All together this implies: He scratched the itch from the scratch > that > itched but would never itch the scratch from the itch that scratched." > -- Keith Wiley > > ________________________________________________________________________________ > >
