Summary
Full GC happens due to the current implementation whenever 'Remote Shell' (with 'SSH' protocol) or 'v1.0/SSH Shell' operation in Base CP is executed.
Error
Whenever one of the following SSH related operations is executed, the full gc always happens.
/Base [1.10.x]/Library/Operations/Remote Command Execution/Remote Shell (with 'SSH' protocol)
/Base [1.10.x]/Library/Operations/Remote Command Execution/SSH/v1.0/SSH Shell
Cause
It is due to the current implementation of each operation.
Fix
Such a full gc will be removed in a future release of Base CP but to avoid it right now, use 'v2.0/SSH Shell' in Base CP or add -XX:+DisableExplicitGC to JVM of a worker.