Github user kumarvishal09 commented on a diff in the pull request: https://github.com/apache/carbondata/pull/3046#discussion_r244708667 --- Diff: processing/src/main/java/org/apache/carbondata/processing/loading/steps/CarbonRowDataWriterProcessorStepImpl.java --- @@ -128,16 +128,18 @@ public CarbonRowDataWriterProcessorStepImpl(CarbonDataLoadConfiguration configur CarbonTimeStatisticsFactory.getLoadStatisticsInstance() .recordDictionaryValue2MdkAdd2FileTime(CarbonTablePath.DEPRECATED_PARTITION_ID, System.currentTimeMillis()); - + ExecutorService fallBackExecutorService = + Executors.newFixedThreadPool(1, new CarbonThreadFactory("FallBackPool:")); --- End diff -- pool size cannot be always one ...please refer org/apache/carbondata/processing/store/writer/AbstractFactDataWriter.java:203
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