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From Gagan Agrawal <agrawalga...@gmail.com>
Subject Flink job failing due to "Container is running beyond physical memory limits" error.
Date Sat, 24 Nov 2018 06:13:57 GMT
Hi,
I am running flink job on yarn where it ran fine so far (4-5 days) and have
now started failing with following errors.

2018-11-24 03:46:21,029 INFO  org.apache.flink.yarn.YarnResourceManager
                - Closing TaskExecutor connection
container_1542008917197_0038_01_000006 because: Container
[pid=18380,containerID=container_1542008917197_0038_01_000006] *is running
beyond physical memory limits. Current usage: 3.0 GB of 3 GB physical
memory used; 5.0 GB of 15 GB virtual memory used. Killing container.*

This is simple job where we are reading 2 Avro streams from Kafka and
applying some custom UDF after creating keyed stream from union on those 2
streams and writing back output to Kafka. Udf internally uses Map State
with RocksDB backend. Currently size of checkpoint is around 300 GB and we
are running this with 10 task manager with 3 GB memory each. I have also
set "containerized.heap-cutoff-ratio: 0.5" but still facing same issue.
Flink version is 1.6.2

Here is the flink command
./bin/flink run -m yarn-cluster -yd -yn 10 -ytm 3072 -ys 4 job.jar

I want to understand what are typical reasons for this issue? Also why
would flink consume more memory than allocated as JVM memory is fixed and
will not grow beyond max heap. Can this be something related to RocksDB
where it may be consuming memory outside heap and hence over using defined
limits? I didn't find this issue when checkpoint size was small (<50 GB).
But ever since we are now at 300GB size, this issue is coming frequently. I
can try increasing memory, but I am still interested in knowing what are
typical reasons for this error if Jvm heap memory can not grow beyond
defined limit.

Gagan

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