[sr-dev] [tracker] Comment added: zombie dialogs in state 5

[sip-router]

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The following task has a new comment added:

FS#424 - zombie dialogs in state 5
User who did this - Ovidiu Sas (osas)

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As I said in my previous post, if the transaction is created right after the BYE is received (using t_newtran()), then it works ok.
So yes, the workaround is to pre-create the transaction before doing any blocking operations.

The issue here is that the tm callbacks are lost when the transaction is not pre-created.  And this is an issue that will affect all modules that are using tm callbacks.  There are no ERROR logs to show that callbacks have been lost and an admin will have a hard time figuring out what's going on when weird things are happening.  If we want to just enforce the workaraound (pre-create the transaction) it would be helpful to somehow notify in the logs that callbacks registration will be lost.
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More information can be found at the following URL:
http://sip-router.org/tracker/index.php?do=details&task_id=424#comment1624

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