Oozie Shell Action not consistent, sometimes its could not execute the shell script properly but the status is always succeeded

[#1]

I have a shell script and its properly working when executing manually.

I execute it using oozie shell action and properly working but later on it suddenly will not work but the shell action status is still succeeded.

I did not do changes on the script. but if I re-run the shell action will work fine. why it's not consistent ant idea?

I'm using oozie 4.2 and shell action 0.3

[#2]

I solved the issue already, this is happening when one of the datanode storage is full/fully utilize.