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https://issues.apache.org/jira/browse/HDFS-11701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16341958#comment-16341958
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genericqa commented on HDFS-11701:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
17s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m
0s{color} | {color:red} The patch doesn't appear to include any new or modified
tests. Please justify why no new tests are needed for this patch. Also please
list what manual steps were performed to verify this patch. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 15m
22s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
34s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
19s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
37s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
10m 19s{color} | {color:green} branch has no errors when building and testing
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
22s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
26s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
34s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
31s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m
31s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
14s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
33s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
10m 30s{color} | {color:green} patch has no errors when building and testing
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
28s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
25s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m
24s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
20s{color} | {color:green} The patch does not generate ASF License warnings.
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| {color:black}{color} | {color:black} {color} | {color:black} 45m 49s{color} |
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:5b98639 |
| JIRA Issue | HDFS-11701 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12906795/HDFS-11701.002.patch |
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit shadedclient findbugs checkstyle |
| uname | Linux 54bc14841ebc 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20
11:50:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 6eef3d7 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_151 |
| findbugs | v3.1.0-RC1 |
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/22839/testReport/ |
| Max. process+thread count | 409 (vs. ulimit of 5000) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-client U:
hadoop-hdfs-project/hadoop-hdfs-client |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/22839/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> NPE from Unresolved Host causes permanent DFSInputStream failures
> -----------------------------------------------------------------
>
> Key: HDFS-11701
> URL: https://issues.apache.org/jira/browse/HDFS-11701
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 2.6.0
> Environment: AWS Centos linux running HBase CDH 5.9.0 and HDFS CDH
> 5.9.0
> Reporter: James Moore
> Assignee: Lokesh Jain
> Priority: Major
> Attachments: HDFS-11701.001.patch, HDFS-11701.002.patch
>
>
> We recently encountered the following NPE due to the DFSInputStream storing
> old cached block locations from hosts which could no longer resolve.
> {quote}
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.hdfs.DFSClient.isLocalAddress(DFSClient.java:1122)
> at
> org.apache.hadoop.hdfs.shortcircuit.DomainSocketFactory.getPathInfo(DomainSocketFactory.java:148)
> at
> org.apache.hadoop.hdfs.BlockReaderFactory.getBlockReaderLocal(BlockReaderFactory.java:474)
> at
> org.apache.hadoop.hdfs.BlockReaderFactory.build(BlockReaderFactory.java:354)
> at
> org.apache.hadoop.hdfs.DFSInputStream.blockSeekTo(DFSInputStream.java:662)
> at
> org.apache.hadoop.hdfs.DFSInputStream.seekToNewSource(DFSInputStream.java:1613)
> at
> org.apache.hadoop.fs.FSDataInputStream.seekToNewSource(FSDataInputStream.java:127)
> ~HBase related stack frames trimmed~
> {quote}
> After investigating, the DFSInputStream appears to have been open for upwards
> of 3-4 weeks and had cached block locations from decommissioned nodes that no
> longer resolve in DNS and had been shutdown and removed from the cluster 2
> weeks prior. If the DFSInputStream had refreshed its block locations from
> the name node, it would have received alternative block locations which would
> not contain the decommissioned data nodes. As the above NPE leaves the
> non-resolving data node in the list of block locations the DFSInputStream
> never refreshes the block locations and all attempts to open a BlockReader
> for the given blocks will fail.
> In our case, we resolved the NPE by closing and re-opening every
> DFSInputStream in the cluster to force a purge of the block locations cache.
> Ideally, the DFSInputStream would re-fetch all block locations for a host
> which can't be resolved in DNS or at least the blocks requested.
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