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https://issues.apache.org/jira/browse/HBASE-21582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16717704#comment-16717704
 ] 

Hadoop QA commented on HBASE-21582:
-----------------------------------

| (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 
22s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} hbaseanti {color} | {color:green}  0m  
0s{color} | {color:green} Patch does not have any anti-patterns. {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} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 
25s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
57s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
 8s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  4m 
 2s{color} | {color:green} branch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
52s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
28s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 
 4s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
50s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red}  1m 50s{color} 
| {color:red} hbase-server generated 2 new + 186 unchanged - 2 fixed = 188 
total (was 188) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  1m  
2s{color} | {color:red} hbase-server: The patch generated 2 new + 16 unchanged 
- 2 fixed = 18 total (was 18) {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} shadedjars {color} | {color:green}  3m 
43s{color} | {color:green} patch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green}  
9m  4s{color} | {color:green} Patch does not cause any errors with Hadoop 2.7.4 
or 3.0.0. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m  
8s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
29s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}246m 34s{color} 
| {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
26s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}284m  0s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.client.TestFromClientSideWithCoprocessor |
|   | hadoop.hbase.client.TestSnapshotTemporaryDirectoryWithRegionReplicas |
|   | hadoop.hbase.client.TestAdmin1 |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hbase:b002b0b |
| JIRA Issue | HBASE-21582 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12951365/HBASE-21582.v1.patch |
| Optional Tests |  dupname  asflicense  javac  javadoc  unit  findbugs  
shadedjars  hadoopcheck  hbaseanti  checkstyle  compile  |
| uname | Linux 9e17e670c709 4.4.0-139-generic #165-Ubuntu SMP Wed Oct 24 
10:58:50 UTC 2018 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
 |
| git revision | master / f88224ee34 |
| maven | version: Apache Maven 3.5.4 
(1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T18:33:14Z) |
| Default Java | 1.8.0_181 |
| findbugs | v3.1.0-RC3 |
| javac | 
https://builds.apache.org/job/PreCommit-HBASE-Build/15246/artifact/patchprocess/diff-compile-javac-hbase-server.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HBASE-Build/15246/artifact/patchprocess/diff-checkstyle-hbase-server.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/15246/artifact/patchprocess/patch-unit-hbase-server.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/15246/testReport/ |
| Max. process+thread count | 5100 (vs. ulimit of 10000) |
| modules | C: hbase-server U: hbase-server |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/15246/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> If call HBaseAdmin#snapshotAsync but forget call isSnapshotFinished, then 
> SnapshotHFileCleaner will skip to run every time
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-21582
>                 URL: https://issues.apache.org/jira/browse/HBASE-21582
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Zheng Hu
>            Assignee: Zheng Hu
>            Priority: Major
>             Fix For: 3.0.0, 1.5.0, 2.2.0, 2.1.2, 1.2.10, 1.4.10, 2.0.5
>
>         Attachments: HBASE-21582.v1.patch
>
>
> This is because we remove the SnapshotSentinel  from snapshotHandlers in 
> SnapshotManager#cleanupSentinels.  Only when the following 3 case, the  
> cleanupSentinels will be called: 
> 1.  SnapshotManager#isSnapshotDone; 
> 2.  SnapshotManager#takeSnapshot; 
> 3. SnapshotManager#restoreOrCloneSnapshot
> So if no isSnapshotDone called, or no further snapshot taking, or snapshot 
> restore/clone.  the SnapshotSentinel will always be keep in snapshotHandlers. 
> But after HBASE-21387,  Only when no snapshot taking, the 
> SnapshotHFileCleaner will check the unref files and clean. 
> I found this bug, because in our XiaoMi branch-2,  we implement the soft 
> delete feature, which means if someone delete a table, then master will 
> create a snapshot firstly, after that, the table deletion begain.  the 
> implementation is quite simple, we use the snapshotManager to create a 
> snapshot. 
> {code}
> diff --git 
> a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java 
> b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
> index 8f42e4a..6da6a64 100644
> --- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
> +++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
> @@ -2385,12 +2385,6 @@ public class HMaster extends HRegionServer implements 
> MasterServices {
>        protected void run() throws IOException {
>          getMaster().getMasterCoprocessorHost().preDeleteTable(tableName);
>  
> +        if (snapshotBeforeDelete) {
> +          LOG.info("Take snaposhot for " + tableName + " before deleting");
> +          snapshotManager
> +              
> .takeSnapshot(SnapshotDescriptionUtils.getSnapshotNameForDeletedTable(tableName));
> +        }
> +
>          LOG.info(getClientIdAuditPrefix() + " delete " + tableName);
>  
>          // TODO: We can handle/merge duplicate request
> {code}
> In the master,  I found the endless log after delete a table: 
> {code}
> org.apache.hadoop.hbase.master.snapshot.SnapshotFileCache: Not checking 
> unreferenced files since snapshot is running, it will skip to clean the 
> HFiles this time
> {code}
> This is because the snapshotHandlers never be cleaned after call the  
> snapshotManager#takeSnapshot.  I think the asynSnapshot may has the same 
> problem. 



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