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Hadoop QA commented on HDFS-13924: ---------------------------------- | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 14s{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:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m 0s{color} | {color:green} The patch appears to include 2 new or modified test files. {color} | || || || || {color:brown} HDFS-12943 Compile Tests {color} || | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 5m 34s{color} | {color:blue} Maven dependency ordering for branch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 19m 28s{color} | {color:green} HDFS-12943 passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 16m 29s{color} | {color:green} HDFS-12943 passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 3m 32s{color} | {color:green} HDFS-12943 passed {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 3m 36s{color} | {color:green} HDFS-12943 passed {color} | | {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 19m 34s{color} | {color:green} branch has no errors when building and testing our client artifacts. {color} | | {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 2m 2s{color} | {color:red} hadoop-hdfs-project/hadoop-hdfs in HDFS-12943 has 1 extant Findbugs warnings. {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 35s{color} | {color:green} HDFS-12943 passed {color} | || || || || {color:brown} Patch Compile Tests {color} || | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 20s{color} | {color:blue} Maven dependency ordering for patch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m 31s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 15m 27s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 15m 27s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 3m 22s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 3m 16s{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} 11m 31s{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} 5m 57s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 25s{color} | {color:green} the patch passed {color} | || || || || {color:brown} Other Tests {color} || | {color:green}+1{color} | {color:green} unit {color} | {color:green} 8m 27s{color} | {color:green} hadoop-common in the patch passed. {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 44s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} | | {color:red}-1{color} | {color:red} unit {color} | {color:red} 83m 13s{color} | {color:red} hadoop-hdfs in the patch failed. {color} | | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 48s{color} | {color:green} The patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black}211m 20s{color} | {color:black} {color} | \\ \\ || Reason || Tests || | Failed junit tests | hadoop.hdfs.protocol.TestLayoutVersion | | | hadoop.hdfs.client.impl.TestBlockReaderLocal | \\ \\ || Subsystem || Report/Notes || | Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:4b8c2b1 | | JIRA Issue | HDFS-13924 | | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12944623/HDFS-13924-HDFS-12943.003.patch | | Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle | | uname | Linux 1014b277da93 3.13.0-153-generic #203-Ubuntu SMP Thu Jun 14 08:52:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux | | Build tool | maven | | Personality | /testptch/patchprocess/precommit/personality/provided.sh | | git revision | HDFS-12943 / 3a5b78a | | maven | version: Apache Maven 3.3.9 | | Default Java | 1.8.0_181 | | findbugs | v3.1.0-RC1 | | findbugs | https://builds.apache.org/job/PreCommit-HDFS-Build/25311/artifact/out/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-warnings.html | | unit | https://builds.apache.org/job/PreCommit-HDFS-Build/25311/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt | | Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/25311/testReport/ | | Max. process+thread count | 3639 (vs. ulimit of 10000) | | modules | C: hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs U: . | | Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/25311/console | | Powered by | Apache Yetus 0.8.0 http://yetus.apache.org | This message was automatically generated. > Handle BlockMissingException when reading from observer > ------------------------------------------------------- > > Key: HDFS-13924 > URL: https://issues.apache.org/jira/browse/HDFS-13924 > Project: Hadoop HDFS > Issue Type: Sub-task > Reporter: Chao Sun > Assignee: Chao Sun > Priority: Major > Attachments: HDFS-13924-HDFS-12943.000.patch, > HDFS-13924-HDFS-12943.001.patch, HDFS-13924-HDFS-12943.002.patch, > HDFS-13924-HDFS-12943.003.patch > > > Internally we found that reading from ObserverNode may result to > {{BlockMissingException}}. This may happen when the observer sees a smaller > number of DNs than active (maybe due to communication issue with those DNs), > or (we guess) late block reports from some DNs to the observer. This error > happens in > [DFSInputStream#chooseDataNode|https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L846], > when no valid DN can be found for the {{LocatedBlock}} got from the NN side. > One potential solution (although a little hacky) is to ask the > {{DFSInputStream}} to retry active when this happens. The retry logic already > present in the code - we just have to dynamically set a flag to ask the > {{ObserverReadProxyProvider}} try active in this case. > cc [~shv], [~xkrogen], [~vagarychen], [~zero45] for discussion. -- 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