Return-Path: Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org Received: (qmail 1477 invoked from network); 28 Apr 2008 21:19:39 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 28 Apr 2008 21:19:39 -0000 Received: (qmail 70305 invoked by uid 500); 28 Apr 2008 21:19:39 -0000 Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org Received: (qmail 70280 invoked by uid 500); 28 Apr 2008 21:19:39 -0000 Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-dev@hadoop.apache.org Delivered-To: mailing list core-dev@hadoop.apache.org Received: (qmail 70264 invoked by uid 99); 28 Apr 2008 21:19:39 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 28 Apr 2008 14:19:39 -0700 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 28 Apr 2008 21:18:53 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id A31C1234C105 for ; Mon, 28 Apr 2008 14:15:55 -0700 (PDT) Message-ID: <1305217903.1209417355653.JavaMail.jira@brutus> Date: Mon, 28 Apr 2008 14:15:55 -0700 (PDT) From: "Konstantin Shvachko (JIRA)" To: core-dev@hadoop.apache.org Subject: [jira] Created: (HADOOP-3320) NPE in NetworkTopology.getDistance() MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org NPE in NetworkTopology.getDistance() ------------------------------------ Key: HADOOP-3320 URL: https://issues.apache.org/jira/browse/HADOOP-3320 Project: Hadoop Core Issue Type: Bug Affects Versions: 0.14.0 Reporter: Konstantin Shvachko Assignee: Hairong Kuang Fix For: 0.18.0 I am seeing the following exception: {code} 08/04/28 20:15:09 ERROR dfs.NNThroughputBenchmark: java.lang.NullPointerException at org.apache.hadoop.net.NetworkTopology.getDistance(NetworkTopology.java:443) at org.apache.hadoop.dfs.ReplicationTargetChooser.getPipeline(ReplicationTargetChooser.java:457) at org.apache.hadoop.dfs.ReplicationTargetChooser.chooseTarget(ReplicationTargetChooser.java:126) at org.apache.hadoop.dfs.ReplicationTargetChooser.chooseTarget(ReplicationTargetChooser.java:72) at org.apache.hadoop.dfs.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1140) at org.apache.hadoop.dfs.NameNode.addBlock(NameNode.java:300) at org.apache.hadoop.dfs.NNThroughputBenchmark$BlockReportStats.addBlocks(NNThroughputBenchmark.java:786) at org.apache.hadoop.dfs.NNThroughputBenchmark$BlockReportStats.generateInputs(NNThroughputBenchmark.java:775) at org.apache.hadoop.dfs.NNThroughputBenchmark$OperationStatsBase.benchmark(NNThroughputBenchmark.java:203) at org.apache.hadoop.dfs.NNThroughputBenchmark.runBenchmark(NNThroughputBenchmark.java:1035) at org.apache.hadoop.dfs.NNThroughputBenchmark.main(NNThroughputBenchmark.java:1053) {code} It looks like the problem is in NetworkTopology.chooseRandom(String, String), which returns null in certain cases, but the value returned is never checked for null. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.