java.lang.NullPointerException

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  • java.lang.NullPointerException at io.mycat.sqlengine.mpp.UnsafeRowGrouper.aggregateRow(UnsafeRowGrouper.java:589)[Mycat-server-1.6-RELEASE.jar:?] at io.mycat.sqlengine.mpp.UnsafeRowGrouper.addRow(UnsafeRowGrouper.java:556)[Mycat-server-1.6-RELEASE.jar:?] at io.mycat.sqlengine.mpp.DataNodeMergeManager.run(DataNodeMergeManager.java:373)[Mycat-server-1.6-RELEASE.jar:?] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[?:1.7.0_13] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[?:1.7.0_13] at java.lang.Thread.run(Thread.java:722)[?:1.7.0_13]
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