Improve sync thread alerting mechanism
* When a sync thread triggers an alarm by failing to return from
an HttpPost beyond the socket timeout, we call abort() on the
HttpPost to force it to stop
* It appears that there are cases in which this is insufficient,
and the thread remains hung in a blocked state
* The result of this failure is to prevent the syncing mailbox from
ever syncing again, and is typically seen by a failure to receive
new mail (as reported in the referenced bug)
* In this CL, we add code to wait for 10 seconds after calling the
abort() method. If the HttpPost is still hung, we interrupt() the
thread, and have SyncManager release the Mailbox, so that another
thread can be started.
Bug: 2615293
Change-Id: I6a48195fc68bb950126006326a5b30448d3bbb63
3 files changed
