[FLINK-27099] RestClient fills /tmp directory

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 1.7.2, 1.12.1, 1.14.4
• Component/s: Runtime / REST
• Assignee: Unassigned
• Reporter: Mexicapita
• Created: 06/Apr/22 16:20
• Updated: 23/Mar/23 08:14
• Resolved: 23/Mar/23 08:14

Description

I have some problems with my apache flink stream system. 
A few days ago, we detect that flink was using too much space in the hard disk, and explorint them, we found to many (around a thousand) `.jar` files in `/tmp` directory on jobmanager container.

The .jar files always have a similar name, but with diferent numbers:

• 1695477181_3183563526079495551lib_org.eclipse.paho.client.mqttv3-1.1.0.jar
• 1798263280_2346102789822957064lib_com.google.protobuf_2.6.0.jar

The .jar files was created when I use the 'Submit New Job' menu

In this menu, flink start to polling `GET http://myflink:myport/jars/` (once at second). 
For each request, a couple of .jar files are created.

I can't find any information about this and I'm not sure if its a bug or something. Any help please ?

My installations:

• Flink 1.12.1 running with docker swarm
• Flink 1.7 running with docker compose
• Flink 1.14.4 java 11 running with docker-compose

The three installations have the same problem

Thanks !!!

Issue Links

• is related to: FLINK-21164 Jar handlers don't cleanup temporarily extracted jars