Sessions are being cancelled very frequently

Sessions are being cancelled very frequently
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I am just practising the “Arun Kumar’s examples” and connected to labs via putty. My putty sessions are being dropped very often. If not putty session, spark-shell drops saying this "scala> /usr/hdp/current/spark-client/bin/spark-shell: line 41: 29040 Killed "$FWDIR"/bin/spark-submit --class org.apache.spark.repl.Main --name "Spark shell" "$@""

Due to these I am not able to practice things properly and wasting my time in re-trying things again-and-again.

Is any one else facing this?

Thanks and Regards,


After how long the session is being killed?


Something around 20-30 mins and ofcourse my session is not idle, it happens while I am typing something.


Is the issue still persists?