带有 MongoDB 的 Java 堆空间

Question

我使用 Tomcat、Eclipse、Java EE、MongoDB。

当我运行我的 java 程序连接到 mongoDB 数据库并保存一些数据时，我得到这个错误:

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),

编辑

我已经更改了Eclipse允许的内存，但我仍然有同样的问题。

这是导致问题的代码。

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

问题已解决

MongoDB版本老，bug多，我现在用的是2.8版本，现在可以用了，谢谢

Answer 1

尝试增加堆大小

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