Failure to read socket: process-execution2

 Hi All,

We recently updated to Appian 16.3. We are facimng multiple issues on the environment. to find out the root cause for one of the issue, When I checked the logs: I saw the following error:

04:05:01,749 INFO [stdout] (Appian Engine Work Controller: process-execution2 3) 2017-04-27 04:05:01,749 [Appian Engine Work Controller: process-execution2 3] ERROR com.appiancorp.kougar.driver.ipc.IpcConnection - Failure to read socket: process-execution2 (localhost:5028)
04:05:01,758 INFO [stdout] (Appian WorkPoller - 2 [ProcessExec02] (originally: default-threads - 15)) 2017-04-27 04:05:01,758 [Appian WorkPoller - 2 [ProcessExec02] (originally: default-threads - 15)] ERROR com.appiancorp.kougar.driver.ipc.IpcConnection - Failure to read socket: process-execution2 (localhost:5028)
04:06:18,607 INFO [stdout] (Appian Engine Work Controller: process-execution2 3) 2017-04-27 04:06:18,607 [Appian Engine Work Controller: process-execution2 3] ERROR com.appiancorp.process.background.EngineWorkController - Cannot retrieve engine burdens: An IpcException has occurred while invoking the method: availableEngineWork on process-execution2 (localhost:5028)
04:06:18,645 INFO [stdout] (Appian WorkPoller - 2 [ProcessExec02] (originally: default-threads - 15)) 2017-04-27 04:06:18,624 [Appian WorkPoller - 2 [ProcessExec02] (originally: default-threads - 15)] ERROR com.appiancorp.ra.workpoller.WorkPoller - ProcessExec02: Error while trying to accept Work in Bulk: An IpcException has occurred while invoking the method: acceptWorkBulk on process-execution2 (localhost:5028)

Can anyone guide why we are seeing this error and how can we fix it?

Thanks

Rishu