Unable to login to spark-shell

I am not able to launch spark-shell.

spark-shell --master yarn --conf spark.ui.port=12345

Getting the below error message when I try to connect as above

Multiple versions of Spark are installed but SPARK_MAJOR_VERSION is not set
Spark1 will be picked by default
Java HotSpot™ 64-Bit Server VM warning: INFO: os::commit_memory(0x000070eb42c00000, 703594496, 0) failed; error=‘Cannot allocate memory’ (errno=12)

Please look into this issue.

@savitha

This issue is fixed now & i have checked from my side its working now & please reply if there are further more issues.
Thank you for your patience.