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From prashanth-vasudev <...@git.apache.org>
Subject [GitHub] incubator-trafodion pull request #627: [TRAFODION-2129] Trafodion to avoid u...
Date Tue, 02 Aug 2016 19:14:29 GMT
Github user prashanth-vasudev commented on a diff in the pull request:

    https://github.com/apache/incubator-trafodion/pull/627#discussion_r73218875
  
    --- Diff: core/sqf/src/seatrans/hbase-trx/src/main/java/org/apache/hadoop/hbase/client/transactional/TransactionManager.java
---
    @@ -2436,56 +2409,44 @@ public Integer call() throws IOException {
                     return doAbortX(regionName, transactionState.getTransactionId(), participantNum,
location.isTableRecodedDropped());
                   }
                 });
    -/*
    -          } catch (Exception e) {
    -            LOG.error("exception in abort: " + e);
    -          }
    -*/
    -            /*
    -            } catch (UnknownTransactionException e) {
    -        LOG.error("exception in abort: " + e);
    -                LOG.info("Got unknown transaction exception during abort. Transaction:
["
    -                        + transactionState.getTransactionId() + "], region: ["
    -                        + location.getRegionInfo().getRegionNameAsString() + "]. Ignoring.");
    -            } catch (NotServingRegionException e) {
    -                LOG.info("Got NSRE during abort. Transaction: [" + transactionState.getTransactionId()
+ "], region: ["
    -                        + location.getRegionInfo().getRegionNameAsString() + "]. Ignoring.");
    -            }
    -            */
             }
     
             // all requests sent at this point, can record the count
             transactionState.completeSendInvoke(loopCount);
         }
    +         
    +        CommitUnsuccessfulException savedCue = null;
     
             //if DDL is involved with this transaction, need to unwind it.
             if(transactionState.hasDDLTx())
             {
     
                 //First wait for abort requests sent to all regions is received back.
                 //This TM thread gets SUSPENDED until all abort threads complete!!!
    -            try{
    +            boolean loopExit = false;
    +            do
    +            {
    +              try {
                     transactionState.completeRequest();
    -            }
    -            catch(Exception e){
    -                LOG.error("Exception in abort() completeRequest. txID: " + transactionState.getTransactionId()
+ "Exception: " + e);
    -                //return; //Do not return here. This thread should continue servicing
DDL operations.
    -            }
    -
    -            try{
    -                abortDDL(transactionState);
    -            }
    -            catch(Exception e){
    -                LOG.error("FATAL Exception calling abortDDL for transaction: " + transactionState.getTransactionId()
+ "Exception: "  + e);
    -                throw new UnsuccessfulDDLException(e);
    -            }
    +                loopExit = true; 
    +              } 
    +              catch (InterruptedException ie) {}
    +              catch (CommitUnsuccessfulException cue) {
    +                 loopExit = true;
    +                 LOG.error("Exception at the time of aborting DDL transaction", cue);

    --- End diff --
    
    AbortDDL is not started yet here. The error message needs to get updated something like
"CommitUnSuccessful Exception received from one or more of abort threads before servicing
abortDDL" 


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