Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id CEBFCC12C for ; Thu, 27 Jun 2013 10:46:23 +0000 (UTC) Received: (qmail 39866 invoked by uid 500); 27 Jun 2013 10:46:22 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 39699 invoked by uid 500); 27 Jun 2013 10:46:21 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 39674 invoked by uid 99); 27 Jun 2013 10:46:20 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 27 Jun 2013 10:46:20 +0000 Date: Thu, 27 Jun 2013 10:46:20 +0000 (UTC) From: "rajeshbabu (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HBASE-8814) Possible NPE in split if a region has empty store files. MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HBASE-8814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13694608#comment-13694608 ] rajeshbabu commented on HBASE-8814: ----------------------------------- Test failure(TestAccessController.testBulkLoad) is not related to this issue. > Possible NPE in split if a region has empty store files. > -------------------------------------------------------- > > Key: HBASE-8814 > URL: https://issues.apache.org/jira/browse/HBASE-8814 > Project: HBase > Issue Type: Bug > Components: regionserver > Reporter: rajeshbabu > Assignee: rajeshbabu > Fix For: 0.98.0, 0.95.2, 0.94.10 > > Attachments: HBASE-8814_trunk.patch > > > {code} > 2013-06-27 14:12:54,472 INFO [RS:1;BLRY2R009039160:49833-splits-1372322572806] regionserver.SplitRequest(92): Running rollback/cleanup of failed split of testSplitShouldNotThrowNPEEvenARegionHasEmptySplitFiles,,1372322556662.276e00da1420119e2f91f3a4c4c41d78.; java.util.concurrent.ExecutionException: java.lang.NullPointerException > java.io.IOException: java.util.concurrent.ExecutionException: java.lang.NullPointerException > at org.apache.hadoop.hbase.regionserver.SplitTransaction.splitStoreFiles(SplitTransaction.java:602) > at org.apache.hadoop.hbase.regionserver.SplitTransaction.createDaughters(SplitTransaction.java:297) > at org.apache.hadoop.hbase.regionserver.SplitTransaction.execute(SplitTransaction.java:466) > at org.apache.hadoop.hbase.regionserver.SplitRequest.run(SplitRequest.java:82) > at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:662) > Caused by: java.util.concurrent.ExecutionException: java.lang.NullPointerException > at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222) > at java.util.concurrent.FutureTask.get(FutureTask.java:83) > at org.apache.hadoop.hbase.regionserver.SplitTransaction.splitStoreFiles(SplitTransaction.java:596) > ... 6 more > Caused by: java.lang.NullPointerException > at org.apache.hadoop.hbase.regionserver.HRegionFileSystem.splitStoreFile(HRegionFileSystem.java:539) > at org.apache.hadoop.hbase.regionserver.SplitTransaction.splitStoreFile(SplitTransaction.java:610) > at org.apache.hadoop.hbase.regionserver.SplitTransaction.access$1(SplitTransaction.java:607) > at org.apache.hadoop.hbase.regionserver.SplitTransaction$StoreFileSplitter.call(SplitTransaction.java:633) > at org.apache.hadoop.hbase.regionserver.SplitTransaction$StoreFileSplitter.call(SplitTransaction.java:1) > at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) > at java.util.concurrent.FutureTask.run(FutureTask.java:138) > ... 3 more > {code} > If a storefile is empty(can be because of puts and deletes) then first and lastkey of the file will be empty. Then we will get first or last key as null. Then we will end up in NPE when we will check splitkey in the range or not. > {code} > if (top) { > //check if larger than last key. > KeyValue splitKey = KeyValue.createFirstOnRow(splitRow); > byte[] lastKey = f.createReader().getLastKey(); > if (f.getReader().getComparator().compare(splitKey.getBuffer(), > splitKey.getKeyOffset(), splitKey.getKeyLength(), lastKey, 0, lastKey.length) > 0) { > return null; > } > } else { > //check if smaller than first key > KeyValue splitKey = KeyValue.createLastOnRow(splitRow); > byte[] firstKey = f.createReader().getFirstKey(); > if (f.getReader().getComparator().compare(splitKey.getBuffer(), > splitKey.getKeyOffset(), splitKey.getKeyLength(), firstKey, 0, firstKey.length) < 0) { > return null; > } > } > {code} -- This message is automatically generated by JIRA. 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