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https://issues.apache.org/jira/browse/HADOOP-15206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16365070#comment-16365070
 ] 

genericqa commented on HADOOP-15206:
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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 
15s{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 1 new or modified test 
files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  1m 
32s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 15m 
36s{color} | {color:green} trunk passed {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red} 17m  
4s{color} | {color:red} root in trunk failed. {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
51s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
29s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
13m 18s{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 
58s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  
3s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
33s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
 7s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 11m 
59s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 11m 59s{color} 
| {color:red} root generated 178 new + 1053 unchanged - 0 fixed = 1231 total 
(was 1053) {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
1m 48s{color} | {color:orange} root: The patch generated 1 new + 50 unchanged - 
0 fixed = 51 total (was 50) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
29s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  
0s{color} | {color:red} The patch has 2 line(s) that end in whitespace. Use git 
apply --whitespace=fix <<patch_file>>. Refer https://git-scm.com/docs/git-apply 
{color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}  
9m  9s{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}  2m  
4s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
11s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  8m 
24s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}120m 10s{color} 
| {color:red} hadoop-mapreduce-client-jobclient in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
32s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}211m 18s{color} | 
{color:black} {color} |
\\
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|| Reason || Tests ||
| Failed junit tests | hadoop.mapreduce.v2.TestMRJobs |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:5b98639 |
| JIRA Issue | HADOOP-15206 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12910617/HADOOP-15206.006.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 8769a4c10c6a 4.4.0-43-generic #63-Ubuntu SMP Wed Oct 12 
13:48:03 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 8f66aff |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_151 |
| compile | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14126/artifact/out/branch-compile-root.txt
 |
| findbugs | v3.1.0-RC1 |
| javac | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14126/artifact/out/diff-compile-javac-root.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14126/artifact/out/diff-checkstyle-root.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14126/artifact/out/whitespace-eol.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14126/artifact/out/patch-unit-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-jobclient.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14126/testReport/ |
| Max. process+thread count | 1406 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient
 U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14126/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> BZip2 drops and duplicates records when input split size is small
> -----------------------------------------------------------------
>
>                 Key: HADOOP-15206
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15206
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.8.3, 3.0.0
>            Reporter: Aki Tanaka
>            Assignee: Aki Tanaka
>            Priority: Major
>         Attachments: HADOOP-15206-test.patch, HADOOP-15206.001.patch, 
> HADOOP-15206.002.patch, HADOOP-15206.003.patch, HADOOP-15206.004.patch, 
> HADOOP-15206.005.patch, HADOOP-15206.006.patch
>
>
> BZip2 can drop and duplicate record when input split file is small. I 
> confirmed that this issue happens when the input split size is between 1byte 
> and 4bytes.
> I am seeing the following 2 problem behaviors.
>  
> 1. Drop record:
> BZip2 skips the first record in the input file when the input split size is 
> small
>  
> Set the split size to 3 and tested to load 100 records (0, 1, 2..99)
> {code:java}
> 2018-02-01 10:52:33,502 INFO  [Thread-17] mapred.TestTextInputFormat 
> (TestTextInputFormat.java:verifyPartitions(317)) - 
> splits[1]=file:/work/count-mismatch2/hadoop/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/target/test-dir/TestTextInputFormat/test.bz2:3+3
>  count=99{code}
> > The input format read only 99 records but not 100 records
>  
> 2. Duplicate Record:
> 2 input splits has same BZip2 records when the input split size is small
>  
> Set the split size to 1 and tested to load 100 records (0, 1, 2..99)
>  
> {code:java}
> 2018-02-01 11:18:49,309 INFO [Thread-17] mapred.TestTextInputFormat 
> (TestTextInputFormat.java:verifyPartitions(318)) - splits[3]=file 
> /work/count-mismatch2/hadoop/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/target/test-dir/TestTextInputFormat/test.bz2:3+1
>  count=99
> 2018-02-01 11:18:49,310 WARN [Thread-17] mapred.TestTextInputFormat 
> (TestTextInputFormat.java:verifyPartitions(308)) - conflict with 1 in split 4 
> at position 8
> {code}
>  
> I experienced this error when I execute Spark (SparkSQL) job under the 
> following conditions:
> * The file size of the input files are small (around 1KB)
> * Hadoop cluster has many slave nodes (able to launch many executor tasks)
>  



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