[ https://issues.apache.org/jira/browse/HDFS-7929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14731193#comment-14731193 ]
Zhe Zhang commented on HDFS-7929: --------------------------------- Good question Sangjin. HDFS-8846 is a test-only change and I think it's OK to leave it to the next release. > inotify unable fetch pre-upgrade edit log segments once upgrade starts > ---------------------------------------------------------------------- > > Key: HDFS-7929 > URL: https://issues.apache.org/jira/browse/HDFS-7929 > Project: Hadoop HDFS > Issue Type: Bug > Reporter: Zhe Zhang > Assignee: Zhe Zhang > Labels: 2.6.1-candidate > Fix For: 2.7.0, 2.6.1 > > Attachments: HDFS-7929-000.patch, HDFS-7929-001.patch, > HDFS-7929-002.patch, HDFS-7929-003.patch > > > inotify is often used to periodically poll HDFS events. However, once an HDFS > upgrade has started, edit logs are moved to /previous on the NN, which is not > accessible. Moreover, once the upgrade is finalized /previous is currently > lost forever. -- This message was sent by Atlassian JIRA (v6.3.4#6332)