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This controls how many transactions streaming agents such as Flume or Storm open simultaneously. The streaming agent then writes that number of entries into a single file (per Flume agent or Storm bolt). Thus increasing this value decreases the number of delta files created by streaming agents. But it also increases the number of open transactions that Hive has to track at any given time, which may negatively affect read performance.
hive.txn.retryable.sqlex.regex
- Default Value: [empty]
- Added In: Hive 1.3.0 and 2.1.0 with HIVE-12637
Comma separated list of regular expression patterns for SQL state, error code, and error message of retryable SQLExceptions, that's suitable for the Hive metastore database.
For example: Can't serialize.*,40001$,^Deadlock,.*ORA-08176.*
The string that the regex will be matched against is of the following form, where ex is a SQLException:
ex.getMessage() + " (SQLState=" + ex.getSQLState() + ", ErrorCode=" + ex.getErrorCode() + ")"
hive.compactor.initiator.on
- Default Value:
false - Hive Transactions Value:
true(for exactly one instance of the Thrift metastore service) - Added In: Hive 0.13.0 with HIVE-5843
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