laxpio commented on issue #5669: Pulsar Broker restart fail owing to create
functions/assignments topic fail
URL: https://github.com/apache/pulsar/issues/5669#issuecomment-561978582
i modify the code，deal NUll return，and now can not reproduce it.
original code：
org/apache/bookkeeper/
laxpio commented on issue #5669: Pulsar Broker restart fail owing to create
functions/assignments topic fail
URL: https://github.com/apache/pulsar/issues/5669#issuecomment-559315362
enabled Deduplication，
the logs are cleaned.
