Re: batch job OOM

Posted by Fanbin Bu on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/batch-job-OOM-tp32342p32354.html

I saw the doc in https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/config.html.

Do i have to set that in the code or can i do it through flink-conf.yaml?

On Wed, Jan 22, 2020 at 7:54 PM Fanbin Bu <[hidden email]> wrote:

Jingsong,

Thank you for the response.

Since I'm using flink on EMR and the latest version is 1.9 now. the second option is ruled out. but will keep that in mind for future upgrade.

I'm going to try the first option. It's probably a good idea to add that in the doc for example: https://ci.apache.org/projects/flink/flink-docs-stable/ops/config.html

Thanks,

Fanbin

On Wed, Jan 22, 2020 at 7:08 PM Jingsong Li <[hidden email]> wrote:

Hi Fanbin,

Thanks for using blink batch mode.

The OOM is caused by the manage memory not enough in Hash aggregation.

There are three options you can choose from:

1.Is your version Flink 1.9? 1.9 still use fix memory configuration. So you need increase hash memory:

- table.exec.resource.hash-agg.memory: 1024 mb

2.In 1.10, we use slot manage memory to dynamic config real operator memory, so operator can use more manage memory, so you don't need configure hash agg memory anymore. You can try 1.10 RC0 [1]

3.We can use sort aggregation to avoid OOM too, but there is no config option now, I created JIRA to track it. [2]

[1] http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/ANNOUNCE-Apache-Flink-1-10-0-release-candidate-0-td36770.html

[2] https://issues.apache.org/jira/browse/FLINK-15732

Best,

Jingsong Lee

On Thu, Jan 23, 2020 at 7:40 AM Fanbin Bu <[hidden email]> wrote:

tried to increase memory:
flink run  -m yarn-cluster -p 16 -ys 1 -ytm 200000 -yjm 8096 myjar

and still got the same OOM exception.

my sql is like:

select id, hop_end(created_at, interval '30' second, interval '1' minute), sum(field)... #20 of these sums

from table group by id, hop(created_at, interval '30' second, interval '1' minute)

On Wed, Jan 22, 2020 at 3:19 PM Fanbin Bu <[hidden email]> wrote:

Hi,

I have a batch job using blink planner. and got the following error. I was able to successfully run the same job with flink 1.8 on yarn.

I set conf as:

taskmanager.heap.size: 50000m

and flink UI gives me

Last Heartbeat:20-01-22 14:56:25ID:container_1579720108062_0018_01_000020Data Port:41029Free Slots / All Slots:1 / 0CPU Cores:16Physical Memory:62.9 GBJVM Heap Size:10.3 GBFlink Managed Memory:24.9 GB

any suggestions on how to move forward?

Thanks,

Fanbin

Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
at org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:146)
at org.apache.flink.client.program.rest.RestClusterClient.submitJob(RestClusterClient.java:259)
... 25 more
Caused by: java.io.IOException: Hash window aggregate map OOM.
at HashWinAggWithKeys$534.processElement(Unknown Source)
at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processElement(StreamOneInputProcessor.java:164)
at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:143)
at org.apache.flink.streaming.runtime.tasks.StreamTask.performDefaultAction(StreamTask.java:276)
at org.apache.flink.streaming.runtime.tasks.StreamTask.run(StreamTask.java:298)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:403)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:705)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:530)
at java.lang.Thread.run(Thread.java:748)

--

Best, Jingsong Lee