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https://issues.apache.org/jira/browse/HIVE-18776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16374978#comment-16374978
 ] 

Hive QA commented on HIVE-18776:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  
0s{color} | {color:blue} Findbugs executables are not available. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
1s{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}  7m 
28s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
39s{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:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
48s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
44s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
37s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
37s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
19s{color} | {color:red} standalone-metastore: The patch generated 2 new + 546 
unchanged - 1 fixed = 548 total (was 547) {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} javadoc {color} | {color:green}  0m 
45s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
13s{color} | {color:red} The patch generated 49 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 12m 14s{color} | 
{color:black} {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 
3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-9338/dev-support/hive-personality.sh
 |
| git revision | master / ed487ac |
| Default Java | 1.8.0_111 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9338/yetus/diff-checkstyle-standalone-metastore.txt
 |
| asflicense | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9338/yetus/patch-asflicense-problems.txt
 |
| modules | C: standalone-metastore U: standalone-metastore |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9338/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> MaterializationsInvalidationCache loading causes race condition in the 
> metastore
> --------------------------------------------------------------------------------
>
>                 Key: HIVE-18776
>                 URL: https://issues.apache.org/jira/browse/HIVE-18776
>             Project: Hive
>          Issue Type: Bug
>          Components: Materialized views, Metastore
>    Affects Versions: 3.0.0
>            Reporter: Alan Gates
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Major
>         Attachments: HIVE-18776.patch
>
>
> I am seeing occasional failures running metastore tests where operations are 
> failing saying that there is no open transaction.  I have traced this to a 
> race condition in loading the materialized view invalidation cache.  When it 
> is initialized (either in HiveMetaStoreClient in embedded mode or in 
> HiveMetaStore in remote mode) it grabs a copy of the current RawStore 
> instance and then loads the cache in a separate thread.  But ObjectStore 
> keeps state regarding JDO transactions with the underlying RDBMS.  So with 
> the loader thread and the initial thread both doing operations against the 
> RawStore they sometimes mess up each others transaction stack.  In a quick 
> test I used HMSHandler.newRawStoreForConf() to fix this, which seemed to work.
> A reference to the TxnHandler is also called.  I suspect this will run into a 
> similar issue.



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