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https://issues.apache.org/jira/browse/HIVE-21796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16857169#comment-16857169
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Hive QA commented on HIVE-21796:
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {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:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 10m
18s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
24s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
49s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 4m
56s{color} | {color:blue} ql in master has 2256 extant Findbugs warnings.
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
14s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m
45s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
27s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
27s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
49s{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} findbugs {color} | {color:green} 5m
15s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
20s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
17s{color} | {color:green} The patch does not generate ASF License warnings.
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| {color:black}{color} | {color:black} {color} | {color:black} 30m 17s{color} |
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|| Subsystem || Report/Notes ||
| Optional Tests | asflicense javac javadoc findbugs checkstyle compile |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian
3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-17441/dev-support/hive-personality.sh
|
| git revision | master / e7f2fccd |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| modules | C: ql U: ql |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-17441/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
This message was automatically generated.
> ArrayWritableObjectInspector.equals can take O(2^nesting_depth) time
> --------------------------------------------------------------------
>
> Key: HIVE-21796
> URL: https://issues.apache.org/jira/browse/HIVE-21796
> Project: Hive
> Issue Type: Bug
> Reporter: Csaba Ringhofer
> Assignee: Csaba Ringhofer
> Priority: Major
> Attachments: HIVE-21796.1.patch, HIVE-21796.2.patch,
> HIVE-21796.patch, jstack.txt
>
>
> The issue came up during an Impala test when we tried to run it with Hive
> 3.1. The a query hanged: it tried to insert 1 row from a Parquet file with a
> 99 level nested column to a similar Orc file, and spent its time in
> ArrayWritableObjectInspector.equals() according to jstack.
> The problem seems to be that equals() calls both fields.equals(that.fields)
> and fieldsByName.equals(that.fieldsByName), and both try to compare all
> nested fields recursively, which leads to the O(2^nesting_depth) complexity.
> The commit that introduced this behavior:
> https://github.com/apache/hive/commit/98a25f2d831ab27e174bc99792047eaa8ec08b82#diff-8c6363e90d442f239bc252a104f1bfed
> The Impala test:
> https://github.com/apache/impala/blob/9ee4a5e1940afa47227a92e0f6fba6d4c9909f63/tests/query_test/test_nested_types.py#L612
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