Recovering from Java OutOfMemory Exceptions

Question

I am using Spring, Hibernate, Java 1.6 etc. I am having a complex logic that has multiple Arralists and Maps created within a method. The data is loaded from database into Lists and then manipulated to get data ready for jsp pages. If the same action is performed quickly and multiple times from that page, it hits the action frequently. As the huge data is processed in action with lists and maps, the applications throws Java Heap OutOfMemory.

If I apply -Xms -Xmx, then it will help to some extent, if my data grows this option will loose to memory issue. I would like to know, is there any way to clear the list once we manipulate and pass them to Model for jsp pages.

OutOfMemory is Error, not Exception and cannot be recovered from. — Nikolay Kuznetsov
– Nikolay Kuznetsov, Commented Feb 13, 2013 at 6:25
Welcome to the world of Big Data. Try solutions like, Hadoop, HBase or some other less complex batch procession solution like Spring batch. — Prateek
– Prateek, Commented Feb 13, 2013 at 7:12

kofemann · Accepted Answer · 2013-02-13 07:00:38Z

1

You can't recover from OOM as you never know when and where it will hit you.

Try to use lazy collections like in google's guava to manipulate on data without creating an extra copy. Use cursors and iterators to avoid full data stored in the memory.

answered Feb 13, 2013 at 7:00

kofemann

4,4831 gold badge38 silver badges43 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

StanislavL · Accepted Answer · 2013-02-13 06:36:14Z

0

Try to use SoftReferences for some big resources you need in memory.

Organize caching to free not necessary content from memory. See for example ehCache

answered Feb 13, 2013 at 6:36

StanislavL

57.5k9 gold badges75 silver badges100 bronze badges

Comments

Ramadas · Accepted Answer · 2013-02-13 07:03:03Z

0

Try using distributed memory caching solutions like - ehcache, Memcached, oracle coherence.

answered Feb 13, 2013 at 7:03

Ramadas

5102 silver badges7 bronze badges

Collectives™ on Stack Overflow

Recovering from Java OutOfMemory Exceptions

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related