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https://issues.apache.org/jira/browse/OAK-8204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16827995#comment-16827995
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zhouxu commented on OAK-8204:
-----------------------------
1.create repository
To use Oak in our project simply add a dependency to
{{org.apache.jackrabbit:oak-jcr:1.0.0}} and to {{javax.jcr:jcr:2.0}}:
DB db = new MongoClient("127.0.0.1", 27017).getDB("oak");
DocumentNodeStore ns = newMongoDocumentNodeStoreBuilder()
.setMongoDB(db, "oak", 0)
.build();
Repository repo = new Jcr(new Oak(ns)).createRepository();
2,create 10 folders,and create 200,000 nodes per folder.
Session session = repository.login(new SimpleCredentials("admin",
"admin".toCharArray()));
String folderName=null;
String docName=null;
Node root = session.getRootNode();
for(int i=1;i<=10;i++){
folderName="J"+i;
if (root.hasNode(folderName)) {
throw new Exception(folderName + " node is exist!");
}
Node node = root.addNode(folderName, JcrConstants.NT_FOLDER);
session.save();
System.out.println("====create folder "+folderName+" success===");
for(int j=1;j<=200000;j++){
docName=folderName+"_"+j+".pdf";
Node parentNode = getNodeByPath(parentPath);
node = parentNode.addNode(docName, JcrConstants.NT_FILE);
//add content node
...
session.save();
}
}
> OutOfMemoryError: create nodes
> ------------------------------
>
> Key: OAK-8204
> URL: https://issues.apache.org/jira/browse/OAK-8204
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: core
> Affects Versions: 1.10.2
> Reporter: zhouxu
> Priority: Major
>
> Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit
> exceede
> d
> at java.lang.AbstractStringBuilder.<init>(AbstractStringBuilder.java:68)
> at java.lang.StringBuilder.<init>(StringBuilder.java:101)
> at org.apache.jackrabbit.oak.commons.PathUtils.concat(PathUtils.java:318
> )
> at org.apache.jackrabbit.oak.plugins.document.DocumentNodeState.getChild
> NodeDoc(DocumentNodeState.java:507)
> at org.apache.jackrabbit.oak.plugins.document.DocumentNodeState.hasChild
> Node(DocumentNodeState.java:256)
> at org.apache.jackrabbit.oak.plugins.memory.MutableNodeState.setChildNod
> e(MutableNodeState.java:111)
> at org.apache.jackrabbit.oak.plugins.memory.MemoryNodeBuilder.setChildNo
> de(MemoryNodeBuilder.java:343)
> at org.apache.jackrabbit.oak.plugins.document.AbstractDocumentNodeBuilde
> r.setChildNode(AbstractDocumentNodeBuilder.java:56)
> at org.apache.jackrabbit.oak.spi.state.ApplyDiff.childNodeAdded(ApplyDif
> f.java:80)
> at org.apache.jackrabbit.oak.plugins.memory.ModifiedNodeState.compareAga
> instBaseState(ModifiedNodeState.java:412)
> at org.apache.jackrabbit.oak.spi.state.ApplyDiff.childNodeChanged(ApplyD
> iff.java:87)
> at org.apache.jackrabbit.oak.plugins.memory.ModifiedNodeState.compareAga
> instBaseState(ModifiedNodeState.java:416)
> at org.apache.jackrabbit.oak.spi.state.ApplyDiff.childNodeChanged(ApplyD
> iff.java:87)
> at org.apache.jackrabbit.oak.plugins.memory.ModifiedNodeState.compareAga
> instBaseState(ModifiedNodeState.java:416)
> at org.apache.jackrabbit.oak.spi.state.ApplyDiff.childNodeChanged(ApplyD
> iff.java:87)
> at org.apache.jackrabbit.oak.plugins.memory.ModifiedNodeState.compareAga
> instBaseState(ModifiedNodeState.java:416)
> at org.apache.jackrabbit.oak.plugins.document.ModifiedDocumentNodeState.
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