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https://issues.apache.org/jira/browse/HIVE-19206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16462853#comment-16462853
]
Hive QA commented on HIVE-19206:
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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
1s{color} | {color:blue} Findbugs executables are not available. {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
47s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m
9s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
55s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
12s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
38s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
10s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
19s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
56s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
56s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m
18s{color} | {color:red} common: The patch generated 12 new + 426 unchanged - 0
fixed = 438 total (was 426) {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
44s{color} | {color:green} ql: The patch generated 0 new + 127 unchanged - 1
fixed = 127 total (was 128) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m
12s{color} | {color:red} streaming: The patch generated 19 new + 47 unchanged -
3 fixed = 66 total (was 50) {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} 1m
32s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
15s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 21m 46s{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-10658/dev-support/hive-personality.sh
|
| git revision | master / dfaf90f |
| Default Java | 1.8.0_111 |
| checkstyle |
http://104.198.109.242/logs//PreCommit-HIVE-Build-10658/yetus/diff-checkstyle-common.txt
|
| checkstyle |
http://104.198.109.242/logs//PreCommit-HIVE-Build-10658/yetus/diff-checkstyle-streaming.txt
|
| modules | C: common ql streaming U: . |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-10658/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
This message was automatically generated.
> Automatic memory management for open streaming writers
> ------------------------------------------------------
>
> Key: HIVE-19206
> URL: https://issues.apache.org/jira/browse/HIVE-19206
> Project: Hive
> Issue Type: Sub-task
> Components: Streaming
> Affects Versions: 3.0.0, 3.1.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
> Priority: Major
> Attachments: HIVE-19206.1.patch, HIVE-19206.2.patch,
> HIVE-19206.3.patch
>
>
> Problem:
> When there are 100s of record updaters open, the amount of memory required
> by orc writers keeps growing because of ORC's internal buffers. This can lead
> to potential high GC or OOM during streaming ingest.
> Solution:
> The high level idea is for the streaming connection to remember all the open
> record updaters and flush the record updater periodically (at some interval).
> Records written to each record updater can be used as a metric to determine
> the candidate record updaters for flushing.
> If stripe size of orc file is 64MB, the default memory management check
> happens only after every 5000 rows which may which may be too late when there
> are too many concurrent writers in a process. Example case would be 100
> writers open and each of them have almost full stripe of 64MB buffered data,
> this would take 100*64MB ~=6GB of memory. When all of the record writers
> flush, the memory usage drops down to 100*~2MB which is just ~200MB memory
> usage.
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