stack created HBASE-19997:
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Summary: [rolling upgrade] 1.x => 2.x
Key: HBASE-19997
URL: https://issues.apache.org/jira/browse/HBASE-19997
Project: HBase
Issue Type: Umbrella
Reporter: stack
Fix For: 2.0.0
An umbrella issue of issues needed so folks can do a rolling upgrade from
hbase-1.x to hbase-2.x.
(Recent) Notables:
* hbase-1.x can't read hbase-2.x WALs -- hbase-1.x doesn't know the
AsyncProtobufLogWriter class used writing the WAL -- see
https://issues.apache.org/jira/browse/HBASE-19166?focusedCommentId=16362897&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16362897
for exception.
** Might be ok... means WAL split fails on an hbase1 RS... must wait till an
hbase-2.x RS picks up the WAL for it to be split.
* hbase-1 can't open regions from tables created by hbase-2; it can't find the
Table descriptor. See
https://issues.apache.org/jira/browse/HBASE-19116?focusedCommentId=16363276&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16363276
** This might be ok if the tables we are doing rolling upgrade over were
written with hbase-1.
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