[ https://issues.apache.org/jira/browse/HDFS-8676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Walter Su updated HDFS-8676: ---------------------------- Assignee: Walter Su Status: Patch Available (was: Open) > Delayed rolling upgrade finalization can cause heartbeat expiration > ------------------------------------------------------------------- > > Key: HDFS-8676 > URL: https://issues.apache.org/jira/browse/HDFS-8676 > Project: Hadoop HDFS > Issue Type: Bug > Reporter: Kihwal Lee > Assignee: Walter Su > Priority: Critical > Attachments: HDFS-8676.01.patch > > > In big busy clusters where the deletion rate is also high, a lot of blocks > can pile up in the datanode trash directories until an upgrade is finalized. > When it is finally finalized, the deletion of trash is done in the service > actor thread's context synchronously. This blocks the heartbeat and can > cause heartbeat expiration. > We have seen a namenode losing hundreds of nodes after a delayed upgrade > finalization. The deletion of trash directories should be made asynchronous. -- This message was sent by Atlassian JIRA (v6.3.4#6332)