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Ted Yu commented on HBASE-20350: -------------------------------- >From KeyValueHeap#close : {code} while ((scanner = this.heap.poll()) != null) { scanner.close(); {code} Can we check the return value from scanner.peek() before calling scanner.close() ? > NullPointerException in Scanner during close() > ---------------------------------------------- > > Key: HBASE-20350 > URL: https://issues.apache.org/jira/browse/HBASE-20350 > Project: HBase > Issue Type: Bug > Affects Versions: 2.0.0-beta-2 > Reporter: Umesh Agashe > Assignee: Appy > Priority: Blocker > Fix For: 2.0.0 > > > From logs: > {code} > 2018-04-03 02:06:00,630 INFO org.apache.hadoop.hbase.regionserver.HRegion: > Replaying edits from > hdfs://ns1/hbase/data/default/IntegrationTestBigLinkedList_20180403004104/834545a2ae1baa47082a3bc7aab2be2f/recovered.edits/0000000000001032167 > 2018-04-03 02:06:00,724 INFO > org.apache.hadoop.hbase.regionserver.RSRpcServices: Scanner > 2120114333978460945 lease expired on region > IntegrationTestBigLinkedList_20180403004104,\xF1\xFE\xCB\x98e1\xF8\xD4,1522742825561.ce0d91585a2d188123173c36d0b693a5. > 2018-04-03 02:06:00,730 ERROR > org.apache.hadoop.hbase.regionserver.HRegionServer: ***** ABORTING region > server vd0510.halxg.cloudera.com,22101,1522626204176: Uncaught exception in > executorService thread > regionserver/vd0510.halxg.cloudera.com/10.17.226.13:22101.leaseChecker ***** > java.lang.NullPointerException > at > org.apache.hadoop.hbase.CellComparatorImpl.compareRows(CellComparatorImpl.java:202) > at > org.apache.hadoop.hbase.CellComparatorImpl.compare(CellComparatorImpl.java:74) > at > org.apache.hadoop.hbase.CellComparatorImpl.compare(CellComparatorImpl.java:61) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:207) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:190) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:178) > at java.util.PriorityQueue.siftDownUsingComparator(PriorityQueue.java:721) > at java.util.PriorityQueue.siftDown(PriorityQueue.java:687) > at java.util.PriorityQueue.poll(PriorityQueue.java:595) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap.close(KeyValueHeap.java:228) > at > org.apache.hadoop.hbase.regionserver.StoreScanner.close(StoreScanner.java:483) > at > org.apache.hadoop.hbase.regionserver.StoreScanner.close(StoreScanner.java:464) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap.close(KeyValueHeap.java:224) > at > org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.close(HRegion.java:6666) > at > org.apache.hadoop.hbase.regionserver.RSRpcServices$ScannerListener.leaseExpired(RSRpcServices.java:460) > at org.apache.hadoop.hbase.regionserver.Leases.run(Leases.java:122) > at java.lang.Thread.run(Thread.java:748) > 2018-04-03 02:06:00,731 ERROR > org.apache.hadoop.hbase.regionserver.HRegionServer: RegionServer abort: > loaded coprocessors are: > [org.apache.hadoop.hbase.security.access.AccessController, > org.apache.hadoop.hbase.security.token.TokenProvider, > org.apache.hadoop.hbase.security.access.SecureBulkLoadEndpoint, > com.cloudera.navigator.audit.hbase.RegionAuditCoProcessor] > 2018-04-03 02:06:00,737 INFO > org.apache.hadoop.hbase.regionserver.HRegionServer: Dump of metrics as JSON > on abort: { > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)