Hi Ilya, I think that property is of less significance, its only to confirm wrt behavior wrt virtual memory. But the imp one is, can we get the snapshot of the heap (using the command shared earlier), from it roughly we can determine which object is hogging the memory.
+ Naga ________________________________ From: Ilya Karpov [i.kar...@cleverdata.ru] Sent: Friday, September 25, 2015 14:34 To: user@hadoop.apache.org Subject: Re: Why would ApplicationManager request RAM more that defaut 1GB? Hi Manoj & Naga, I’m surprised but there is no such a property in CHD conf files (greped all *.xml in OSes where yarn lives!) I think that this property is set by Cloudera: http://image.slidesharecdn.com/yarnsaboutyarn-kathleenting112114-141125155911-conversion-gate01/95/yarns-about-yarn-28-638.jpg?cb=1416931543 (we use chd 5.4.5) 25 сент. 2015 г., в 10:19, Naganarasimha Garla <naganarasimha...@gmail.com<mailto:naganarasimha...@gmail.com>> написал(а): Hi Manoj & Ilya, >From the logs 2015-09-21 22:50:34,018 WARN org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl: Container [pid=13982,containerID=container_1442402147223_0165_01_000001] is running beyond physical memory limits. This indicates that its increase in Physical memory limits and not virtual limits due to which container was killed and also probability that Container Monitor would wait till vmem is 3.4 GB when limit is 2.1 GB to kill it is less. Vmem includes overall memory limits including the files opened etc ... but seems like virtual mem check in your setup seems to be disabled. please check for configuration as mentioned by Manoj "yarn.nodemanager.vmem-check-enabled " to cross verify On Fri, Sep 25, 2015 at 12:15 PM, Ilya Karpov <i.kar...@cleverdata.ru<mailto:i.kar...@cleverdata.ru>> wrote: Hello, Manoj the actual question is why this happens 24 сент. 2015 г., в 20:39, manoj <manojm....@gmail.com<mailto:manojm....@gmail.com>> написал(а): Hello IIya, Looks like the Vmem usage is going above the above 2.1 of Pmem times thats why the container is getting killed, 1.0 GB of 1 GB physical memory used; 3.4 GB of 2.1 GB virtual memory used By default Vmem is set to 2.1 times of the Pmem. Looks like your job is taking 3.4GB! You can change the ratio by setting in Yarn-site.xml: yarn.nodemanager.vmem-pmem-ratio You can optionally disable this check by setting following to false: yarn.nodemanager.vmem-check-enabled Thanks, -Manoj On Wed, Sep 23, 2015 at 12:36 AM, Ilya Karpov <i.kar...@cleverdata.ru<mailto:i.kar...@cleverdata.ru>> wrote: Great thanks for your reply! >1. Which version of Hadoop/ YARN ? Hadoop(command: hadoop version): Hadoop 2.6.0-cdh5.4.5 Subversion http://github.com/cloudera/hadoop -r ab14c89fe25e9fb3f9de4fb852c21365b7c5608b Compiled by jenkins on 2015-08-12T21:11Z Compiled with protoc 2.5.0 >From source with checksum d31cb7e46b8602edaf68d335b785ab This command was run using /opt/cloudera/parcels/CDH-5.4.5-1.cdh5.4.5.p0.7/jars/hadoop-common-2.6.0-cdh5.4.5.jar Yarn (command: yarn version) prints exactly the same. >2. From the logs is it getting killed due to over usage of Vmem or Physical >memory ? Because of over usage of Physical memory. Last seconds of life: 2015-09-21 22:50:34,017 INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl: Memory usage of ProcessTree 13982 for container-id container_1442402147223_0165_01_000001: 1.0 GB of 1 GB physical memory used; 3.4 GB of 2.1 GB virtual memory used 2015-09-21 22:50:34,017 WARN org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl: Process tree for container: container_1442402147223_0165_01_000001 has processes older than 1 iteration running over the configured limit. Limit=1073741824, current usage = 1074352128 2015-09-21 22:50:34,018 WARN org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl: Container [pid=13982,containerID=container_1442402147223_0165_01_000001] is running beyond physical memory limits. Current usage: 1.0 GB of 1 GB physical memory used; 3.4 GB of 2.1 GB virtual memory used. Killing container. Dump of the process-tree for container_1442402147223_0165_01_000001 : |- PID PPID PGRPID SESSID CMD_NAME USER_MODE_TIME(MILLIS) SYSTEM_TIME(MILLIS) VMEM_USAGE(BYTES) RSSMEM_USAGE(PAGES) FULL_CMD_LINE |- 13994 13982 13982 13982 (java) 4285 714 3602911232 261607 /opt/jdk1.8.0_60/bin/java -Dlog4j.configuration=container-log4j.properties -Dyarn.app.container.log.dir=/var/log/hadoop-yarn/contai ner/application_1442402147223_0165/container_1442402147223_0165_01_000001 -Dyarn.app.container.log.filesize=0 -Dhadoop.root.logger=INFO,CLA -Djava.net.preferIPv4Stack=true -Xmx825955249 org.apache.had oop.mapreduce.v2.app.MRAppMaster |- 13982 13980 13982 13982 (bash) 0 0 14020608 686 /bin/bash -c /opt/jdk1.8.0_60/bin/java -Dlog4j.configuration=container-log4j.properties -Dyarn.app.container.log.dir=/var/log/hadoop-yarn/container/application_1442402147223_0165/container_1442402147223_0165_01_000001 -Dyarn.app.container.log.filesize=0 -Dhadoop.root.logger=INFO,CLA -Djava.net.preferIPv4Stack=true -Xmx825955249 org.apache.hadoop.mapreduce.v2.app.MRAppMaster 1>/var/log/hadoop-yarn/container/application_1442402147223_0165/container_1442402147223_0165_01_000001/stdout 2>/var/log/hadoop-yarn/container/application_1442402147223_0165/container_1442402147223_0165_01_000001/stderr 2015-09-21 22:50:34,018 INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl: Removed ProcessTree with root 13982 2015-09-21 22:50:34,025 INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container: Container container_1442402147223_0165_01_000001 transitioned from RUNNING to KILLING 2015-09-21 22:50:34,025 INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch: Cleaning up container container_1442402147223_0165_01_000001 2015-09-21 22:50:34,075 WARN org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor: Exit code from container container_1442402147223_0165_01_000001 is : 143 >3. Can you run " jmap -histo -F <PID of AM container>" and share the heap dump >result? I’ll try to do it asap. >4. If possible can you pastebin the AM logs? yes, https://drive.google.com/file/d/0B1DPTV7TbcO0cEEwSDZyUnBWUEk/view?usp=sharing > 23 сент. 2015 г., в 7:21, Naganarasimha G R (Naga) > <garlanaganarasi...@huawei.com<mailto:garlanaganarasi...@huawei.com>> > написал(а): > > Hi Ilya, > In a normal case AM memory requirement should not be more than the default > for small sized jobs, but seems to be something erroneous in your case, Would > like to have more information : > 1. Which version of Hadoop/ YARN ? > 2. From the logs is it getting killed due to over usage of Vmem or Physical > memory ? > 3. Can you run " jmap -histo -F <PID of AM container>" and share the heap > dump result? > 4. If possible can you pastebin the AM logs? > > + Naga > ________________________________________ > From: Ilya Karpov [i.kar...@cleverdata.ru<mailto:i.kar...@cleverdata.ru>] > Sent: Tuesday, September 22, 2015 21:06 > To: user@hadoop.apache.org<mailto:user@hadoop.apache.org> > Subject: Why would ApplicationManager request RAM more that defaut 1GB? > > Hi all, > can’t figure out subj. > On my hadoop cluster I have an issue when ApplicationMaster(AM) killed by > NodeManager because AM tries to allocate more than default 1GB. MR > application, that AM is in charge of, is a mapper only job(1(!) mapper, no > reducers, downloads data from remote source). At the moment when AM killed, > MR job is ok (uses about 70% of ram limit). MR job doesn't have any custom > counters, distributes caches etc, just downloads data (by portions) via > custom input format. To fix this issue, I raised memory limit for AM, but I > want to know what is the reason of eating 1GB (!) for a trivial job like mine? > -- --Manoj Kumar M
