Gerd Behrmann created CURATOR-310:
-------------------------------------
Summary: Race in PersistentNode startup
Key: CURATOR-310
URL: https://issues.apache.org/jira/browse/CURATOR-310
Project: Apache Curator
Issue Type: Bug
Components: Recipes
Affects Versions: 2.10.0
Reporter: Gerd Behrmann
We ran into what looks like a race in PersisentNode startup:
java.lang.IllegalArgumentException: Path cannot be null
at org.apache.curator.utils.PathUtils.validatePath(PathUtils.java:48)
~[curator-client-2.10.0.jar:na]
at org.apache.curator.utils.PathUtils.validatePath(PathUtils.java:37)
~[curator-client-2.10.0.jar:na]
at org.apache.curator.utils.ZKPaths.fixForNamespace(ZKPaths.java:105)
~[curator-client-2.10.0.jar:na]
at
org.apache.curator.framework.imps.NamespaceImpl.fixForNamespace(NamespaceImpl.java:104)
~[curator-framework-2.10.0.jar:na]
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.fixForNamespace(CuratorFrameworkImpl.java:594)
~[curator-framework-2.10.0.jar:na]
at
org.apache.curator.framework.imps.SetDataBuilderImpl.forPath(SetDataBuilderImpl.java:244)
~[curator-framework-2.10.0.jar:na]
at
org.apache.curator.framework.imps.SetDataBuilderImpl.forPath(SetDataBuilderImpl.java:41)
~[curator-framework-2.10.0.jar:na]
at
dmg.cells.zookeeper.CellCuratorFramework$PathAndBytesableDecorator.forPath(CellCuratorFramework.java:1369)
~[cells-2.16.0-SNAPSHOT.jar:2.16.0-SNAPSHOT]
at
org.apache.curator.framework.recipes.nodes.PersistentNode.setData(PersistentNode.java:323)
~[curator-recipes-2.10.0.jar:na]
The problem here is that PersistentNode#setData calls
PersistentNode#getActualPath, however the nodePath field accessed by
PersistentNode#getActualPath isn't set until
PersistentNode#processBackgroundCallback is called as a result of the
createNode call in PersistentNode#start.
I.e. if one calls PersistentNode#setData right after calling start, there is a
race between the node creation initializing the actual path and
PersistentNode#setData accessing it.
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