[jira] [Commented] (HDFS-8993) Balancer throws NPE
[
https://issues.apache.org/jira/browse/HDFS-8993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14721022#comment-14721022
]
Brahma Reddy Battula commented on HDFS-8993:
Just made duplicate of HDFS-8992, I did it for you..
Balancer throws NPE
---
Key: HDFS-8993
URL: https://issues.apache.org/jira/browse/HDFS-8993
Project: Hadoop HDFS
Issue Type: Bug
Components: balancer mover
Affects Versions: 2.4.1
Reporter: He Xiaoqiao
Balancer may throw NPE because the following {{if Statements}} at line 709 of
Balancer.java
{code:title=Balancer.java}
synchronized (block) {
// update locations
for (String datanodeUuid : blk.getDatanodeUuids()) {
final BalancerDatanode d = datanodeMap.get(datanodeUuid);
if (datanode != null) { // not an unknown datanode
block.addLocation(d);
}
}
}
{code}
Before moving block, Balancer divides into two step to get all DNs info
some blocks of DN from NN. Regarding one DN commission after
{{getDatanodeReport}} then {{getBlockList}} and one block's target is above
DN just right, It will throw NPE when dispatcher.
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[jira] [Commented] (HDFS-8993) Balancer throws NPE
[
https://issues.apache.org/jira/browse/HDFS-8993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14721021#comment-14721021
]
He Xiaoqiao commented on HDFS-8993:
---
sorry to create to the same ticket since first creation not complete... BTW,
how to delete this ticket?
Balancer throws NPE
---
Key: HDFS-8993
URL: https://issues.apache.org/jira/browse/HDFS-8993
Project: Hadoop HDFS
Issue Type: Bug
Components: balancer mover
Affects Versions: 2.4.1
Reporter: He Xiaoqiao
Balancer may throw NPE because the following {{if Statements}} at line 709 of
Balancer.java
{code:title=Balancer.java}
synchronized (block) {
// update locations
for (String datanodeUuid : blk.getDatanodeUuids()) {
final BalancerDatanode d = datanodeMap.get(datanodeUuid);
if (datanode != null) { // not an unknown datanode
block.addLocation(d);
}
}
}
{code}
Before moving block, Balancer divides into two step to get all DNs info
some blocks of DN from NN. Regarding one DN commission after
{{getDatanodeReport}} then {{getBlockList}} and one block's target is above
DN just right, It will throw NPE when dispatcher.
--
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(v6.3.4#6332)
[jira] [Commented] (HDFS-8993) Balancer throws NPE
[
https://issues.apache.org/jira/browse/HDFS-8993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14721019#comment-14721019
]
Brahma Reddy Battula commented on HDFS-8993:
HI [~hexiaoqiao] , this is dupe of HDFS-8992..?
Balancer throws NPE
---
Key: HDFS-8993
URL: https://issues.apache.org/jira/browse/HDFS-8993
Project: Hadoop HDFS
Issue Type: Bug
Components: balancer mover
Affects Versions: 2.4.1
Reporter: He Xiaoqiao
Balancer may throw NPE because the following {{if Statements}} at line 709 of
Balancer.java
{code:title=Balancer.java}
synchronized (block) {
// update locations
for (String datanodeUuid : blk.getDatanodeUuids()) {
final BalancerDatanode d = datanodeMap.get(datanodeUuid);
if (datanode != null) { // not an unknown datanode
block.addLocation(d);
}
}
}
{code}
Before moving block, Balancer divides into two step to get all DNs info
some blocks of DN from NN. Regarding one DN commission after
{{getDatanodeReport}} then {{getBlockList}} and one block's target is above
DN just right, It will throw NPE when dispatcher.
--
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(v6.3.4#6332)
