Catch exception in group commit

[zhangmeng916]

Describe the bug

In group commit commit function, the return value is true or false, denoting whether the group commit succeed or not. However, in the read data path, if there is an exception such as zkclient is closed, etc., an exception will still be thrown in group commit. This is inconsistent with group commit java doc, and also different from normal update zk operation, which catches all exception.

To Reproduce

Zkclient closed will throw an exception in group commit.

Expected behavior

Group commit catches all exceptions and return false.

Additional context

Add any other context about the problem here.