Canmove, confirm
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* [https://bugzilla.mozilla.org/buglist.cgi?keywords=hang&chfieldto=Now&query_format=advanced&chfield=resolution&keywords_type=allwords&chfieldfrom=4m&short_desc=shutdown%20quit%20exit%20close%20closing%20terminat&bug_severity=blocker&bug_severity=critical&bug_severity=major&bug_severity=normal&short_desc_type=anywordssubstr&product=MailNews%20Core&product=Thunderbird Bug's status changed in last 4 months] (but not necessarily fixed)
simplify
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If you close, shut down or exit Thunderbird (or Thunderbird stops on its own) and you see the Thunderbird '''process''' is running in MS-Windows task manager (taskmgr) or linux process status (ps), then you have a shutdown hang. Or perhaps you encountered a message that "Thunderbird is already running". The "already running" message can be a symptom that is not related to hangs, so it is essential that you check taskgmgr or ps to find thunderbird there; if you don't see thunderbird listed, then you do not have a hang.
There are several reported [[#Reported Bugs|Reported Bugs]], but please only comment in a bug, or report a new one, and provide detailed information which you can obtain from the [[#Symptoms|Symptoms]] list below. In other words, just reporting or commenting that you see a hang is not useful - please support your report with data.
= Symptoms =
:'''To recap, please concisely report: OS & Thunderbird version, frequency, safe mode results, cpu, netstat results, indexing on or off, pop or imap account types, sleep/hibernate usage, online/offline usage, STR'''. And, if possible, a hang stack trace.
= Reported Bugs =
After you go stepping through the [[#Symptoms|Symptoms]] list above, check the bugs below to see which fit your exact situation. If none match your exact symptoms please [https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird file a new bug] and include the information gathered above. Bugs typically do not get fixed quickly, so if a bug's status is still open (not marked FIXED) then it probably isn't fixed, even if a new release has been issued.
* '''All hang bugs: [http://bit.ly/bUY5HM Bugzilla query - open, invalid and fixed bugs from the beginning of time]'''
<!-- see "shutdown hang" query at [[Thunderbird:Bug_Queries]] -->
** '''Open Subset: Only open hang bugs:''' In the bugzilla query above , click the Status column to show bugs in Status order** '''Status change: [https://bugzilla.mozilla.org/buglist.cgi?keywords=hang&chfieldto=Now&query_format=advanced&chfield=resolution&keywords_type=allwords&chfieldfrom=4m&short_desc=shutdown%20quit%20exit%20close%20closing%20terminat&bug_severity=blocker&bug_severity=critical&bug_severity=major&bug_severity=normal&short_desc_type=anywordssubstr&product=MailNews%20Core&product=Thunderbird Status of bug has changed recently (4 mo.)] (includes unfixed)
* Selected open bugs:
** {{Bug|508263}} 3.0b3 hangs on exit/shutdown with high cpu, no imap connections [Mac only?] [speculation: losing the network connection/sleeping]
