Michael Ho has posted comments on this change.

Change subject: IMPALA-3962: Clean up scratch tuple batch on scan failures
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Patch Set 1:

(1 comment)

Most likely not MEM_LIMIT_EXCEEDED as we would have returned from 
GetNextInternal() or ProcessSplit(). I tried digging through the parse_status_ 
and scan_node_->status_ in the core but neither shows anything. So,the error 
message may not have been flushed to the log file yet ?

I am thinking of adding a debug action in the loop but it's probably worth 
looking into whether we can use the fuzzer to induce the error.

http://gerrit.cloudera.org:8080/#/c/3991/1/be/src/exec/hdfs-parquet-scanner.cc
File be/src/exec/hdfs-parquet-scanner.cc:

Line 512:             scratch_batch_->num_tuples));
Need the same error handling in this path.


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Gerrit-MessageType: comment
Gerrit-Change-Id: If1e27a1517d09ccaabdae1492b7e1fbf661ae3e5
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Michael Ho <[email protected]>
Gerrit-Reviewer: Dan Hecht <[email protected]>
Gerrit-Reviewer: Michael Ho <[email protected]>
Gerrit-HasComments: Yes

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