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https://issues.apache.org/jira/browse/HIVE-21040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16726254#comment-16726254
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Hive QA commented on HIVE-21040:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {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:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 1m
16s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m
46s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
23s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
43s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 1m
5s{color} | {color:blue} standalone-metastore/metastore-server in master has
188 extant Findbugs warnings. {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 3m
42s{color} | {color:blue} ql in master has 2310 extant Findbugs warnings.
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
10s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
25s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m
48s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
21s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
21s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
42s{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
3s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
10s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
13s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 27m 26s{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-15410/dev-support/hive-personality.sh
|
| git revision | master / e103abc |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| modules | C: standalone-metastore/metastore-server ql U: . |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-15410/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
This message was automatically generated.
> msck does unnecessary file listing at last level of directory tree
> ------------------------------------------------------------------
>
> Key: HIVE-21040
> URL: https://issues.apache.org/jira/browse/HIVE-21040
> Project: Hive
> Issue Type: Improvement
> Reporter: Vihang Karajgaonkar
> Assignee: Vihang Karajgaonkar
> Priority: Major
> Attachments: HIVE-21040.01.patch, HIVE-21040.02.patch,
> HIVE-21040.03.patch, HIVE-21040.04.patch
>
>
> Here is the code snippet which is run by {{msck}} to list directories
> {noformat}
> final Path currentPath = pd.p;
> final int currentDepth = pd.depth;
> FileStatus[] fileStatuses = fs.listStatus(currentPath,
> FileUtils.HIDDEN_FILES_PATH_FILTER);
> // found no files under a sub-directory under table base path; it is
> possible that the table
> // is empty and hence there are no partition sub-directories created
> under base path
> if (fileStatuses.length == 0 && currentDepth > 0 && currentDepth <
> partColNames.size()) {
> // since maxDepth is not yet reached, we are missing partition
> // columns in currentPath
> logOrThrowExceptionWithMsg(
> "MSCK is missing partition columns under " +
> currentPath.toString());
> } else {
> // found files under currentPath add them to the queue if it is a
> directory
> for (FileStatus fileStatus : fileStatuses) {
> if (!fileStatus.isDirectory() && currentDepth <
> partColNames.size()) {
> // found a file at depth which is less than number of partition
> keys
> logOrThrowExceptionWithMsg(
> "MSCK finds a file rather than a directory when it searches
> for "
> + fileStatus.getPath().toString());
> } else if (fileStatus.isDirectory() && currentDepth <
> partColNames.size()) {
> // found a sub-directory at a depth less than number of partition
> keys
> // validate if the partition directory name matches with the
> corresponding
> // partition colName at currentDepth
> Path nextPath = fileStatus.getPath();
> String[] parts = nextPath.getName().split("=");
> if (parts.length != 2) {
> logOrThrowExceptionWithMsg("Invalid partition name " +
> nextPath);
> } else if
> (!parts[0].equalsIgnoreCase(partColNames.get(currentDepth))) {
> logOrThrowExceptionWithMsg(
> "Unexpected partition key " + parts[0] + " found at " +
> nextPath);
> } else {
> // add sub-directory to the work queue if maxDepth is not yet
> reached
> pendingPaths.add(new PathDepthInfo(nextPath, currentDepth + 1));
> }
> }
> }
> if (currentDepth == partColNames.size()) {
> return currentPath;
> }
> }
> {noformat}
> You can see that when the {{currentDepth}} at the {{maxDepth}} it still does
> a unnecessary listing of the files. We can improve this call by checking the
> currentDepth and bailing out early.
> This can improve the performance of msck command significantly especially
> when there are lot of files in each partitions on remote filesystems like S3
> or ADLS
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