Github user zzcclp commented on the issue: https://github.com/apache/carbondata/pull/1025 LGTM, I met the same issue: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long at org.apache.carbondata.processing.sortandgroupby.sortdata.IntermediateFileMerger.writeDataTofile(IntermediateFileMerger.java:347) at org.apache.carbondata.processing.sortandgroupby.sortdata.IntermediateFileMerger.call(IntermediateFileMerger.java:112) at org.apache.carbondata.processing.sortandgroupby.sortdata.IntermediateFileMerger.call(IntermediateFileMerger.java:1) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)
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