Not able to import CSV file in multi server architecture.

Dear Support Team,

We have configured mariadb columnstore with multi server architecture in AWS with below configuration and server status shows everything is in running/active mode.
UM1 - 172.31.7.171 ( Ubuntu 16.04 64 Bit )
PM1 - 172.31.0.155 ( Ubuntu 16.04 64 Bit )
PM2 - 172.31.7.211 ( Ubuntu 16.04 64 Bit )
DB Root : Mount AWS EFS with specific dbroot along with /etc/fstab entries.

Below is the Error which we receive while import .CSV files using below command on UM1 :-
LOAD DATA INFILE '/home/ubuntu/ferrero_mults/fgroup.csv' INTO TABLE fgroup FIELDS TERMINATED BY ',' ENCLOSED BY '\"' LINES TERMINATED BY '\n';

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Jun 16 20:11:48 ip-172-31-7-171 writeenginesplit[7451]: 48.355327 |0|0|0| E 33 CAL0000: #033[0;31mReceived a Cpimport Failure from PM2#033[0m
Jun 16 20:11:48 ip-172-31-7-171 writeenginesplit[7451]: 48.355411 |0|0|0| E 33 CAL0087: BulkLoad Error: #033[0;31mReceived a Cpimport Failure from PM2#033[0m
Jun 16 20:13:14 ip-172-31-7-171 writeenginesplit[7515]: 14.580518 |0|0|0| E 33 CAL0000: #033[0;31mReceived a Cpimport Failure from PM1#033[0m
Jun 16 20:13:14 ip-172-31-7-171 writeenginesplit[7515]: 14.580587 |0|0|0| E 33 CAL0087: BulkLoad Error: #033[0;31mReceived a Cpimport Failure from PM1#033[0m
Jun 16 20:15:00 ip-172-31-7-171 writeenginesplit[7585]: 00.155368 |0|0|0| E 33 CAL0000: #033[0;31mReceived a Cpimport Failure from PM1#033[0m
Jun 16 20:15:00 ip-172-31-7-171 writeenginesplit[7585]: 00.155471 |0|0|0| E 33 CAL0087: BulkLoad Error: #033[0;31mReceived a Cpimport Failure from PM1#033[0m
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Here i have also attached "columnstoreSupportReport" which is generated from UM1.
Please help me to resolve this as i could find much more help to resolve this issue.