vpnvishv opened a new pull request #1415:
URL: https://github.com/apache/hive/pull/1415
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### What changes were proposed in this pull request?
Below changes are only with respect to branch-3.1.
Design: taken from
https://issues.apache.org/jira/secure/attachment/12954375/Aborted%20Txn%20w_Direct%20Write.pdf
**Overview:**
1. add a dummy row to TXN_COMPONENTS with operation type 'p' in
enqueueLockWithRetry, which will be removed in addDynamicPartition
2. If anytime txn is aborted, this dummy entry will be block initiator to
remove this txnId from TXNS
3. Initiator will add a row in COMPACTION_QUEUE (with type 'p') for the
above aborted txn with the state as READY_FOR_CLEANING, at a time there will be
a single entry of this type for a table in COMPACTION_QUEUE.
4. Cleaner will directly pickup above request, and process it via new
cleanAborted code path(scan all partitions and remove aborted dirs), once
successful cleaner will remove dummy row from TXN_COMPONENTS
**Cleaner Design:**
- We are keeping cleaner single thread, and this new type of cleanup will be
handled similar to any regular cleanup
**Aborted dirs cleanup:**
- In p-type cleanup, cleaner will iterate over all the partitions and remove
all delta/base dirs with given aborted writeId list
- added cleanup of aborted base/delta in the worker also
**TXN_COMPONENTS cleanup:**
- If successful, p-type entry will be removed from TXN_COMPONENTS during
addDynamicPartitions
- If aborted, cleaner will clean in markCleaned after successful processing
of p-type cleanup
**TXNS cleanup:**
- No change, will be cleaned up by the initiator
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### Why are the changes needed?
To fix above mentioned issue.
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### Does this PR introduce _any_ user-facing change?
No
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### How was this patch tested?
unit-tests added
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