[ https://issues.apache.org/jira/browse/HDFS-7101?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Akira Ajisaka updated HDFS-7101: -------------------------------- Description: {code} String lastLine = null; int errCode = -1; try { while ((line = input.readLine()) != null) { ... if (lastLine.endsWith(NamenodeFsck.HEALTHY_STATUS)) { errCode = 0; {code} If the input stream is empty, lastLine is kept null, leading to NPE. was: {code} String lastLine = null; int errCode = -1; try { while ((line = input.readLine()) != null) { ... if (lastLine.endsWith(NamenodeFsck.HEALTHY_STATUS)) { errCode = 0; {code} If readLine() throws exception, lastLine may be null, leading to NPE. > Potential null dereference in DFSck#doWork() > -------------------------------------------- > > Key: HDFS-7101 > URL: https://issues.apache.org/jira/browse/HDFS-7101 > Project: Hadoop HDFS > Issue Type: Bug > Affects Versions: 2.5.1 > Reporter: Ted Yu > Assignee: skrho > Priority: Minor > Labels: BB2015-05-TBR > Attachments: HDFS-7101.v1.patch, HDFS-7101_001.patch > > > {code} > String lastLine = null; > int errCode = -1; > try { > while ((line = input.readLine()) != null) { > ... > if (lastLine.endsWith(NamenodeFsck.HEALTHY_STATUS)) { > errCode = 0; > {code} > If the input stream is empty, lastLine is kept null, leading to NPE. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org