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https://issues.apache.org/jira/browse/HIVE-17684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16606515#comment-16606515
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Hive QA commented on HIVE-17684:
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| (x) *{color:red}-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
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
36s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m
21s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 7m
24s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
3s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 4m
22s{color} | {color:blue} ql in master has 2310 extant Findbugs warnings.
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 8m
19s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
7s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m
11s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 7m
27s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 7m
27s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m
42s{color} | {color:red} ql: The patch generated 1 new + 31 unchanged - 0 fixed
= 32 total (was 31) {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} xml {color} | {color:green} 0m
2s{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 4m
12s{color} | {color:red} ql generated 4 new + 2309 unchanged - 1 fixed = 2313
total (was 2310) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 7m
53s{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} 59m 45s{color} |
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:ql |
| | Incorrect lazy initialization and update of static field
org.apache.hadoop.hive.ql.exec.Operator.hiveGcTimeMonitor in
org.apache.hadoop.hive.ql.exec.Operator.initialize(Configuration,
ObjectInspector[]) At Operator.java:of static field
org.apache.hadoop.hive.ql.exec.Operator.hiveGcTimeMonitor in
org.apache.hadoop.hive.ql.exec.Operator.initialize(Configuration,
ObjectInspector[]) At Operator.java:[lines 430-434] |
| | Write to static field
org.apache.hadoop.hive.ql.exec.Operator.criticalGcTimePercentage from instance
method org.apache.hadoop.hive.ql.exec.Operator.initialize(Configuration,
ObjectInspector[]) At Operator.java:from instance method
org.apache.hadoop.hive.ql.exec.Operator.initialize(Configuration,
ObjectInspector[]) At Operator.java:[line 432] |
| | Write to static field
org.apache.hadoop.hive.ql.exec.Operator.hiveGcTimeMonitor from instance method
org.apache.hadoop.hive.ql.exec.Operator.initialize(Configuration,
ObjectInspector[]) At Operator.java:from instance method
org.apache.hadoop.hive.ql.exec.Operator.initialize(Configuration,
ObjectInspector[]) At Operator.java:[line 434] |
| | Write to static field
org.apache.hadoop.hive.ql.exec.Operator.lastAlertGcTimePercentage from instance
method
org.apache.hadoop.hive.ql.exec.Operator$HiveGcTimeMonitor$1.alert(GcTimeMonitor$GcData)
At Operator.java:from instance method
org.apache.hadoop.hive.ql.exec.Operator$HiveGcTimeMonitor$1.alert(GcTimeMonitor$GcData)
At Operator.java:[line 141] |
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|| Subsystem || Report/Notes ||
| Optional Tests | asflicense xml javac javadoc compile findbugs
checkstyle |
| 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-13631/dev-support/hive-personality.sh
|
| git revision | master / 50d5bbb |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| checkstyle |
http://104.198.109.242/logs//PreCommit-HIVE-Build-13631/yetus/diff-checkstyle-ql.txt
|
| findbugs |
http://104.198.109.242/logs//PreCommit-HIVE-Build-13631/yetus/new-findbugs-ql.html
|
| modules | C: . ql U: . |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-13631/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
This message was automatically generated.
> HoS memory issues with MapJoinMemoryExhaustionHandler
> -----------------------------------------------------
>
> Key: HIVE-17684
> URL: https://issues.apache.org/jira/browse/HIVE-17684
> Project: Hive
> Issue Type: Bug
> Components: Spark
> Reporter: Sahil Takiar
> Assignee: Misha Dmitriev
> Priority: Major
> Attachments: HIVE-17684.01.patch, HIVE-17684.02.patch,
> HIVE-17684.03.patch, HIVE-17684.04.patch, HIVE-17684.05.patch,
> HIVE-17684.06.patch
>
>
> We have seen a number of memory issues due the {{HashSinkOperator}} use of
> the {{MapJoinMemoryExhaustionHandler}}. This handler is meant to detect
> scenarios where the small table is taking too much space in memory, in which
> case a {{MapJoinMemoryExhaustionError}} is thrown.
> The configs to control this logic are:
> {{hive.mapjoin.localtask.max.memory.usage}} (default 0.90)
> {{hive.mapjoin.followby.gby.localtask.max.memory.usage}} (default 0.55)
> The handler works by using the {{MemoryMXBean}} and uses the following logic
> to estimate how much memory the {{HashMap}} is consuming:
> {{MemoryMXBean#getHeapMemoryUsage().getUsed() /
> MemoryMXBean#getHeapMemoryUsage().getMax()}}
> The issue is that {{MemoryMXBean#getHeapMemoryUsage().getUsed()}} can be
> inaccurate. The value returned by this method returns all reachable and
> unreachable memory on the heap, so there may be a bunch of garbage data, and
> the JVM just hasn't taken the time to reclaim it all. This can lead to
> intermittent failures of this check even though a simple GC would have
> reclaimed enough space for the process to continue working.
> We should re-think the usage of {{MapJoinMemoryExhaustionHandler}} for HoS.
> In Hive-on-MR this probably made sense to use because every Hive task was run
> in a dedicated container, so a Hive Task could assume it created most of the
> data on the heap. However, in Hive-on-Spark there can be multiple Hive Tasks
> running in a single executor, each doing different things.
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