QiangCai opened a new pull request #3897:
URL: https://github.com/apache/carbondata/pull/3897
### Why is this PR needed?
CDC merge tasks are blocked when data loading use
CarbonTableOutputFormat.getRecordWriter method.
Because the poll method of the queue is time out in some cases.
### What changes were proposed in this PR?
If the output is not closed, it will poll a row batch in the loops till it
gets a not null batch.
If the output is closed, it will break the loop.
### Does this PR introduce any user interface change?
- No
### Is any new testcase added?
- No
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