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Posted to hdfs-issues@hadoop.apache.org by "Akira Ajisaka (JIRA)" <ji...@apache.org> on 2018/04/10 15:14:00 UTC
[jira] [Updated] (HDFS-7101) Potential null dereference in
DFSck#doWork()
[ 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.
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