Github user trixpan commented on the issue:
https://github.com/apache/nifi/pull/1521
**JPercivall**
The Get/PutAWSIoT processors read and overwrite mqttClient many times
without a read/write lock, this can lead to problems in multi-threaded
scenarios. For example, the both processors call
"AbstractAWSIoTProcessor.connect()" when the connection is about to expire.
When a processor is running with more than one thread, multiple will
potentially enter that method and attempt to reconnect the client.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
