Synchronization issues around state transition
----------------------------------------------
Key: HDFS-2693
URL: https://issues.apache.org/jira/browse/HDFS-2693
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ha, name-node
Affects Versions: HA branch (HDFS-1623)
Reporter: Todd Lipcon
Priority: Critical
Currently when the NN changes state, it does so without synchronization. In
particular, the state transition function does:
(1) leave old state
(2) change state variable
(3) enter new state
This means that the NN is marked as "active" before it has actually
transitioned to active mode and opened its edit logs. This gives a window where
write transactions can come in and the {{checkOperation}} allows them, but then
they fail because the edit log is not yet opened.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
