David S. Wang created HBASE-6009:
------------------------------------
Summary: Changes for HBASE-5209 are technically incompatible
Key: HBASE-6009
URL: https://issues.apache.org/jira/browse/HBASE-6009
Project: HBase
Issue Type: Bug
Components: master
Affects Versions: 0.94.0, 0.92.1
Reporter: David S. Wang
The additions to add backup masters to ClusterStatus are technically
incompatible between clients and servers. Older clients will basically not
read the extra bits that the newer server pushes for the backup masters, thus
screwing up the serialization for the next blob in the pipe.
For the Writable, we can add a total size field for ClusterStatus at the
beginning, or we can have start and end markers. I can make a patch for either
approach; interested in whatever folks have to suggest. Would be good to get
this in soon to limit the damage to 0.92.1 (don't know if we can get this in in
time for 0.94.0).
Either change will make us forward-compatible starting with when the change
goes in, but will not fix the backwards incompatibility, which we will have to
mark with a release note as there have already been releases with this change.
Hopefully we can do this in a cleaner way when wire compat rolls around in 0.96.
--
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
