THBase WAL recovery sometimes needs to access __GLOBAL_TRX_TABLE__, but it may
be stuck offline waiting on current region opening
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Key: HBASE-1884
URL: https://issues.apache.org/jira/browse/HBASE-1884
Project: Hadoop HBase
Issue Type: Bug
Components: contrib
Reporter: Clint Morgan
Coming back after a crash, we have region A, and region for __GLOBAL_TRX_LOG.
Assuming that there was a pending trx in A at the time of commit, it will find
that in the WAL, and need to ask __GLOBAL_TRX_LOG__ what happend with that
transaction. However, if we are opening region A before region
__GLOBAL_TRX_LOG__ then we will fail to be able to query as we are blocking the
opening of the __GLOBAL_TRX_LOG__ region, but we need it to open region A.
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