[jira] [Created] (OAK-548) Moving larger trees cause OutOfMemoryError

["Michael Dürig (JIRA)" <ji...@apache.org>]

Michael Dürig created OAK-548:
---------------------------------

             Summary: Moving larger trees cause OutOfMemoryError
                 Key: OAK-548
                 URL: https://issues.apache.org/jira/browse/OAK-548
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: core
            Reporter: Michael Dürig


{{LargeMoveTest.moveTest}} test runs out of heap space when moving roughly 100000 nodes (128M heap):

{code}
java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Arrays.java:2786)
	at java.lang.StringCoding.safeTrim(StringCoding.java:64)
	at java.lang.StringCoding.access$300(StringCoding.java:34)
	at java.lang.StringCoding$StringEncoder.encode(StringCoding.java:251)
	at java.lang.StringCoding.encode(StringCoding.java:272)
	at java.lang.String.getBytes(String.java:946)
	at org.apache.jackrabbit.mk.util.IOUtils.writeString(IOUtils.java:84)
	at org.apache.jackrabbit.mk.store.BinaryBinding.writeMap(BinaryBinding.java:98)
	at org.apache.jackrabbit.mk.model.ChildNodeEntriesMap.serialize(ChildNodeEntriesMap.java:196)
	at org.apache.jackrabbit.mk.model.AbstractNode.serialize(AbstractNode.java:169)
	at org.apache.jackrabbit.mk.persistence.InMemPersistence.writeNode(InMemPersistence.java:76)
	at org.apache.jackrabbit.mk.store.DefaultRevisionStore.putNode(DefaultRevisionStore.java:276)
	at org.apache.jackrabbit.mk.model.StagedNodeTree$StagedNode.persist(StagedNodeTree.java:568)
	at org.apache.jackrabbit.mk.model.StagedNodeTree$StagedNode.persist(StagedNodeTree.java:563)
	at org.apache.jackrabbit.mk.model.StagedNodeTree$StagedNode.persist(StagedNodeTree.java:563)
	at org.apache.jackrabbit.mk.model.StagedNodeTree$StagedNode.persist(StagedNodeTree.java:563)
	at org.apache.jackrabbit.mk.model.StagedNodeTree$StagedNode.persist(StagedNodeTree.java:563)
	at org.apache.jackrabbit.mk.model.StagedNodeTree$StagedNode.persist(StagedNodeTree.java:563)
	at org.apache.jackrabbit.mk.model.StagedNodeTree$StagedNode.persist(StagedNodeTree.java:563)
	at org.apache.jackrabbit.mk.model.StagedNodeTree.persist(StagedNodeTree.java:80)
	at org.apache.jackrabbit.mk.model.CommitBuilder.doCommit(CommitBuilder.java:126)
	at org.apache.jackrabbit.mk.model.CommitBuilder.doCommit(CommitBuilder.java:94)
	at org.apache.jackrabbit.mk.core.MicroKernelImpl.commit(MicroKernelImpl.java:496)
	at org.apache.jackrabbit.oak.kernel.KernelNodeStoreBranch.commit(KernelNodeStoreBranch.java:178)
	at org.apache.jackrabbit.oak.kernel.KernelNodeStoreBranch.setRoot(KernelNodeStoreBranch.java:78)
	at org.apache.jackrabbit.oak.core.RootImpl.purgePendingChanges(RootImpl.java:355)
	at org.apache.jackrabbit.oak.core.RootImpl.commit(RootImpl.java:234)
	at org.apache.jackrabbit.oak.core.LargeMoveTest.moveTest(LargeMoveTest.java:78)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
{code}

This is caused by the inefficient rebase implementation in oak-core as discussed at length in OAK-464.

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