[HIVE-16109] TestDbTxnManager generates a huge hive.log

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.3.0
• Component/s: Tests, Transactions
• Assignee: Vihang Karajgaonkar
• Reporter: Vihang Karajgaonkar
• Created: 03/Mar/17 23:49
• Updated: 21/Jul/17 18:46
• Resolved: 04/Mar/17 20:57

Description

Pre-commit jobs are failing currently due to out of disk space. The issue is happening due to huge size of hive.log when TestDbTxnManager test fails or times-out. When this test fails or times-out Ptest tries to persist these logs for debugging. Since this test has been timing out frequently, this accumulates a lot of these log files and eventually Ptest server runs of disk space. Each run of TestDbTxnManager is generating ~30 GB of hive.log. I tried to run it locally and it quickly reached 7 GB until I had to cancel it.

The issue seems to be coming from this code block in TxnHandler.java

if(LOG.isDebugEnabled()) {
        LOG.debug("Locks to check(full): ");
        for(LockInfo info : locks) {
          LOG.debug("  " + info);
        }
      }

We should either change it trace or change the log mode of this test to INFO so that it generates smaller log files.

Issue Links

• is broken by: HIVE-13335 tune TxnHandler.performTimeOuts() batch size