[FLINK-9848] When Parallelism more than available task slots Flink stays idle

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Abandoned
• Affects Version/s: 1.5.0, 1.5.1
• Component/s: Runtime / Coordination
• Assignee: Yazdan Shirvany
• Reporter: Yazdan Shirvany
• Created: 13/Jul/18 15:44
• Updated: 27/Mar/20 13:54
• Resolved: 27/Mar/20 13:54

Description

For version 1.4.x when select Parallelism > Available task Slots, Flink throw bellow error right away 

NoResourceAvailableException: Not enough free slots available to run the job
 
but for version 1.5.x there are two different behaviors: Sometimes job ran successfully and sometimes it throw bellow error after 5 minutes 

 
org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableException: Could not allocate all requires slots within timeout of 300000 ms. Slots required: 5, slots allocated: 2