Notify processor throws "channel unregistered before processing completed" error

[#1]

Hello Experts,

I am using Wait - notify processors for my flow, once in a while I am seeing this error in Notify processor.

java.lang.RuntimeException: Unable to communicate with cache when processing.
The screen shot attached. 

Any idea what is the reason and how to resolve this ?

Thanks in advance.

Mahendra

[#2 · Accepted solution]

Found the issue, DisrtibtedMapCacheServer was configured with default 1 mb to handle in each cache request.
But I was trying to pass a attribute value to pass to wait processor from Notify which was 1.5 mb.
After increasing the cache server config from 1mb to 10 mb it worked