ODPS MR节点跑graph连通分量计算代码报错java heap space如何解决

[step=1,vertices=88515603,edges=107261712,halted=0,messages=107261712,running=9,max_mem_workerid=2,max_mem=4065M]
FAILED: ODPS-0730001: Java heap space
java.lang.OutOfMemoryError: Java heap space
at sun.misc.Unsafe.park(Native Method)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ThreadPoolExecutor.awaitTermination(ThreadPoolExecutor.java:1465)
at com.aliyun.odps.graph.node.worker.WorkerSlave.doCompute(WorkerSlave.java:394)
at com.aliyun.odps.graph.node.worker.WorkerSlave.run(WorkerSlave.java:161)
in worker 5
Exception in thread "main" java.io.IOException: Job failed!
at com.aliyun.odps.graph.GraphJob.run(GraphJob.java:372)
at ConnectFamily.main(ConnectFamily.java:175)
FAILED: Run job failed.