[ https://issues.apache.org/jira/browse/HIVE-20330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16701180#comment-16701180 ]
Hive QA commented on HIVE-20330: -------------------------------- | (/) *{color:green}+1 overall{color}* | \\ \\ || 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:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 42s{color} | {color:blue} Maven dependency ordering for branch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 7m 14s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 38s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 22s{color} | {color:green} master passed {color} | | {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 0m 35s{color} | {color:blue} hcatalog/core in master has 31 extant Findbugs warnings. {color} | | {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 0m 24s{color} | {color:blue} hcatalog/hcatalog-pig-adapter in master has 2 extant Findbugs warnings. {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 24s{color} | {color:green} master passed {color} | || || || || {color:brown} Patch Compile Tests {color} || | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 11s{color} | {color:blue} Maven dependency ordering for patch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 40s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 38s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 38s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 12s{color} | {color:green} hcatalog/core: The patch generated 0 new + 113 unchanged - 10 fixed = 113 total (was 123) {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 10s{color} | {color:green} hcatalog/hcatalog-pig-adapter: The patch generated 0 new + 102 unchanged - 1 fixed = 102 total (was 103) {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} 0m 41s{color} | {color:green} hcatalog/core generated 0 new + 30 unchanged - 1 fixed = 30 total (was 31) {color} | | {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 32s{color} | {color:green} hcatalog-pig-adapter in the patch passed. {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 24s{color} | {color:green} the patch passed {color} | || || || || {color:brown} Other Tests {color} || | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 12s{color} | {color:green} The patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black} 14m 36s{color} | {color:black} {color} | \\ \\ || Subsystem || Report/Notes || | Optional Tests | asflicense javac javadoc findbugs checkstyle compile | | uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux | | Build tool | maven | | Personality | /data/hiveptest/working/yetus_PreCommit-HIVE-Build-15084/dev-support/hive-personality.sh | | git revision | master / 56926af | | Default Java | 1.8.0_111 | | findbugs | v3.0.0 | | modules | C: hcatalog/core hcatalog/hcatalog-pig-adapter U: hcatalog | | Console output | http://104.198.109.242/logs//PreCommit-HIVE-Build-15084/yetus.txt | | Powered by | Apache Yetus http://yetus.apache.org | This message was automatically generated. > HCatLoader cannot handle multiple InputJobInfo objects for a job with > multiple inputs > ------------------------------------------------------------------------------------- > > Key: HIVE-20330 > URL: https://issues.apache.org/jira/browse/HIVE-20330 > Project: Hive > Issue Type: Bug > Components: HCatalog > Reporter: Adam Szita > Assignee: Adam Szita > Priority: Major > Attachments: HIVE-20330.0.patch, HIVE-20330.1.patch, > HIVE-20330.2.patch, HIVE-20330.3.patch, HIVE-20330.4.patch, > HIVE-20330.5.patch, HIVE-20330.6.patch > > > While running performance tests on Pig (0.12 and 0.17) we've observed a huge > performance drop in a workload that has multiple inputs from HCatLoader. > The reason is that for a particular MR job with multiple Hive tables as > input, Pig calls {{setLocation}} on each {{LoaderFunc (HCatLoader)}} instance > but only one table's information (InputJobInfo instance) gets tracked in the > JobConf. (This is under config key {{HCatConstants.HCAT_KEY_JOB_INFO}}). > Any such call overwrites preexisting values, and thus only the last table's > information will be considered when Pig calls {{getStatistics}} to calculate > and estimate required reducer count. > In cases when there are 2 input tables, 256GB and 1MB in size respectively, > Pig will query the size information from HCat for both of them, but it will > either see 1MB+1MB=2MB or 256GB+256GB=0.5TB depending on input order in the > execution plan's DAG. > It should of course see 256.00097GB in total and use 257 reducers by default > accordingly. > In unlucky cases this will be seen as 2MB and 1 reducer will have to struggle > with the actual 256.00097GB... -- This message was sent by Atlassian JIRA (v7.6.3#76005)