Exception in thread main java lang OutOfMemoryError Java heap space

Question

I have written a code and I run it a lot but suddenly I got an OutOfMemoryError     Exception in thread  main  java lang OutOfMemoryError  Java heap space         at javax media j3d BoundingBox  lt init gt  BoundingBox java 86          at javax media j3d NodeRetained  lt init gt  NodeRetained java 198          at javax media j3d LeafRetained  lt init gt  LeafRetained java 40          at javax media j3d LightRetained  lt init gt  LightRetained java 44          at javax media j3d DirectionalLightRetained  lt init gt  DirectionalLightRetained java 50          at javax media j3d DirectionalLight createRetained DirectionalLight java 116          at javax media j3d SceneGraphObject  lt init gt  SceneGraphObject java 119          at javax media j3d Node  lt init gt  Node java 178          at javax media j3d Leaf  lt init gt  Leaf java 50          at javax media j3d Light  lt init gt  Light java 270          at javax media j3d DirectionalLight  lt init gt  DirectionalLight java 87

User · Answer

I don t know about javax media j3d  so I might be mistaken  but you usually want to investigate whether there is a memory leak  Well  as others note  if it was 64MB and you are doing something with 3d  maybe it s obviously too small       But if I were you  I ll set up a profiler or visualvm  and let your application run for extended time  days  weeks      Then look at the heap allocation history  and make sure it s not a memory leak    If you use a profiler  like JProfiler or the one that comes with NetBeans IDE etc   you can see what object is being accumulating  and then track down what s going on   Well  almost always something is incorrectly not removed from a collection

User · Answer

If you re recompiling a disassembled APK with APK tool   Just Set Memory Allocation a little bigger  set switch -Xmx1024mto -Xmx2048m  java -Xmx2048m -jar signapk jar -w testkey x509 pem testkey pk8   APKOUT     SIGNED     you re good to go

User · Answer

There is a another best effective way to solve this error  for example  let s take a loop which counts till 10 thousand  here you may get the error Out of memory  do to solve it you can give the computer time to recover  So  you can sleep for 400-500ms before you re loop counts the next number   new Thread new Runnable                 public void run                     try                       sleep 550      550 ms  milli seconds                    catch  InterruptedException e                        e printStackTrace                                               start     By doing this  will make you re program slower but you don t get any error till the heap space is full again  so by waiting some ms  you can prevent that error  You can apply this method other than loop  Hope it helped you   D

User · Answer

Well  it s fairly self-explanatory  you ve run out of memory   You may want to try starting it with more memory  using the -Xmx flag  e g   java -Xmx2048m  whatever you d have written before    This will use up to 2 gigs of memory   See the non-standard options list for more details

User · Answer

You re out of memory   Try adding -Xmx256m to your java command line   The 256m is the amount of memory to give to the JVM  256 megabytes    It usually defaults to 64m

User · Answer

-Xmx1024m -XX MaxPermSize 512m -Xms512m  Add this parameter as argument in your server params

[java] Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

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