Java heap space with MongoDB

Question

I use Tomcat, Eclipse, Java EE, MongoDB.

when I run my java program which is to connect to a mongoDB database and save some data, I get this error:

Exception in thread "http-bio-8080-exec-19"
java.lang.OutOfMemoryError: Java heap space
        at java.nio.HeapCharBuffer.<init>(HeapCharBuffer.java:57)
        at java.nio.CharBuffer.allocate(CharBuffer.java:331)
        at com.mongodb.ByteEncoder.<init>(ByteEncoder.java:546)
        at com.mongodb.ByteEncoder.<init>(ByteEncoder.java:48)
        at com.mongodb.ByteEncoder$1.createNew(ByteEncoder.java:79)
        at com.mongodb.ByteEncoder$1.createNew(ByteEncoder.java:76)
        at com.mongodb.util.SimplePool._get(SimplePool.java:140)
        at com.mongodb.util.SimplePool.get(SimplePool.java:106)
        at com.mongodb.util.SimplePool.get(SimplePool.java:95)
        at com.mongodb.ByteEncoder.get(ByteEncoder.java:66)
        at com.mongodb.DBMessage.<init>(DBMessage.java:52)
        at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:166)
        at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:132)
        at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:127)
        at web.ApplicationInterface.doGet(ApplicationInterface.java:125)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110),

EDIT

I have already changed the memory allowed by Eclipse, but I still have the same problem.

This is the code that causes the problem.

db.requestStart();
try 
{
    coll.insert(doc);
    DBObject err = db.getLastError();
} 
finally 
{
    db.requestDone();
}

PROBLEM SOLVED

The version of MongoDB was old and full of bug, I am now using version 2.8, and Now it's working, Thank you

'allowed by Eclipse' means? Did you add memory settings in run configurations > Arguments — titogeo
– titogeo, Commented Aug 7, 2012 at 9:48
what is doc ? add the first line in try, System.out.println(doc); — Dmitry Zagorulkin
– Dmitry Zagorulkin, Commented Aug 7, 2012 at 9:50

Dmitry Zagorulkin · Accepted Answer · 2012-08-07 09:07:42Z

3

try to increase heap size

JVM -- keys
 -Xms<size>        set initial Java heap size
 -Xmx<size>        set maximum Java heap size

answered Aug 7, 2012 at 9:07

Dmitry Zagorulkin

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Community · Accepted Answer · 2017-05-23 12:27:33Z

2

Try to allow more memory for your JVM, with -Xmx1024m option (for example): How to deal with "java.lang.OutOfMemoryError: Java heap space" error (64MB heap size)

edited May 23, 2017 at 12:27

CommunityBot

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answered Aug 7, 2012 at 9:06

yegor256

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vektor · Accepted Answer · 2012-08-07 09:18:11Z

0

How much data are you trying to save? I think you are trying to store large amount of data in one shot to MongoDB.

edited Aug 7, 2012 at 9:18

vektor

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answered Aug 7, 2012 at 9:10

Byter

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1 Comment

sdlfkj dlsfj Over a year ago

There not a lot of data to save, just 10 rows

titogeo · Accepted Answer · 2012-08-07 10:47:14Z

0

Edit these in Run Configurations For Run Configurations Right click your project root --> Run As--> Run Configurations

Add -Xms<size> and -Xmx<size> in VM arguments

answered Aug 7, 2012 at 10:47

titogeo

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