Wei-Chiu Chuang created HDFS-12112:
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Summary: TestBlockManager#testBlockManagerMachinesArray sometimes
fails with NPE
Key: HDFS-12112
URL: https://issues.apache.org/jira/browse/HDFS-12112
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 3.0.0-beta1
Environment: CDH5.12.0
Reporter: Wei-Chiu Chuang
Assignee: Wei-Chiu Chuang
Priority: Minor
Found the following error:
{quote}
java.lang.NullPointerException: null
at
org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManager.testBlockManagerMachinesArray(TestBlockManager.java:1202)
{quote}
The NPE suggests corruptStorageDataNode in the following code snippet could be
null.
{code}
for(int i=0; i<corruptStorageDataNode.getStorageInfos().length; i++) {
{code}
Looking at the code, the test does not wait for file replication to happen,
which is why corruptStorageDataNode (the DN of the second replica) is null.
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