[jira] [Created] (FLINK-9300) Improve error message when in-memory state is too large

[Shang Yuanchun (Jira)]

Ken Krugler created FLINK-9300:
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             Summary: Improve error message when in-memory state is too large
                 Key: FLINK-9300
                 URL: https://issues.apache.org/jira/browse/FLINK-9300
             Project: Flink
          Issue Type: Improvement
    Affects Versions: 1.4.2
            Reporter: Ken Krugler


Currently in the {{MemCheckpointStreamFactory.checkSize()}} method, it can throw an {{IOException}} via:


{code:java}
throw new IOException(
"Size of the state is larger than the maximum permitted memory-backed state. Size="
+ size + " , maxSize=" + maxSize
+ " . Consider using a different state backend, like the File System State backend.");{code}

But this will happen even if you’re using the File System State backend.

This came up here: [https://stackoverflow.com/questions/50149005/ioexception-size-of-the-state-is-larger-than-the-maximum-permitted-memory-backe]

We could change the message to be:
{quote}Please consider increasing the maximum permitted memory size, increasing the task manager parallelism, or using a non-memory-based state backend such as RocksDB.
{quote}
 

 



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