[ https://issues.apache.org/jira/browse/HDFS-7225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinod Kumar Vavilapalli updated HDFS-7225: ------------------------------------------ Labels: 2.6.1-candidate (was: ) This wasn't originally in 2.6.1, must have been committed to 2.6, which was already 2.6.2. I just committed this to 2.6.1 taking [~sjlee0] cherry-pick, which must have come from branch-2.6. Ran compilation and TestComputeInvalidateWork before the push. > Remove stale block invalidation work when DN re-registers with different UUID > ----------------------------------------------------------------------------- > > Key: HDFS-7225 > URL: https://issues.apache.org/jira/browse/HDFS-7225 > Project: Hadoop HDFS > Issue Type: Bug > Components: namenode > Affects Versions: 2.6.0 > Reporter: Zhe Zhang > Assignee: Zhe Zhang > Labels: 2.6.1-candidate > Fix For: 2.7.0, 2.6.1 > > Attachments: HDFS-7225-v1.patch, HDFS-7225-v2.patch, > HDFS-7225-v3.patch, HDFS-7225.004.patch, HDFS-7225.005.patch > > > {{BlockManager#invalidateWorkForOneNode}} looks up a DataNode by the > {{datanodeUuid}} and passes the resultant {{DatanodeDescriptor}} to > {{InvalidateBlocks#invalidateWork}}. However, if a wrong or outdated > {{datanodeUuid}} is used, a null pointer will be passed to {{invalidateWork}} > which will use it to lookup in a {{TreeMap}}. Since the key type is > {{DatanodeDescriptor}}, key comparison is based on the IP address. A null key > will crash the NameNode with an NPE. -- This message was sent by Atlassian JIRA (v6.3.4#6332)