Ticket 49410 - opened connection can remain no longer poll, like hanging
Some opened connection are no longer poll.
Those connections has 'gettingber' toggle set although there is
no more worker thread reading it.
The reason they have gettingber set is that the last
operation had 'persistent search' flag. With such flag
gettingber is not reset.
persistent flag is set even when no persistent search/sync_repl
was received on the connection.
The problem is that the flag is tested on the wrong operation.
The tested operation can be
- the first operation when the connection entered in turbo mode
- the previous operation if several ops PDUs were read on the network
- accessing random memory
In theory testing the flag can lead to sigsev even
if it never crash
The fix is to use the operation that is in the pblock
In such case pb_op is no longer used, so we can get rid of it.
In addition make pb_conn a local variable where it is used
Reviewed by: Ludwig Krispenz, Mark Reynolds
Platforms tested: F26
Flag Day: no
Doc impact: no