[OpenSIPS-Users] Error in TURN Servers

[Nabeel]

Hi,

I am recently getting the following error, '437 Allocation Mismatch', in
multiple Turn servers I have tried. The same error occurs in Coturn and
reTurnServer on multiple physical server instances and when using all
versions of the client I am using, which never had this issue. The common
factor in these cases, as a possible cause, is the SIP server, so I am
hoping someone will be able to advise. In the log of OpenSIPS itself, there
is nothing specific regarding this error. The error appears in all Turn
server logs as below:



Coturn log: session 001000000000000001: realm <> user <>: incoming packet
> message processed, *error 437: Mismatched allocation: wrong transaction*



reTurnServer log: DEBUG | 20170809-074953.802 | reTurnServer | RETURN |
> 139914911389440 | RequestHandler.cxx:455 | Allocation request received:
> localTuple=[UDP 162.259.6.236:3478], remoteTuple=[UDP 188.29.165.172:29101]
> WARNING | 20170809-074953.802 | reTurnServer | RETURN | 139914911389440 |
> RequestHandler.cxx:462 | *Allocation requested but already exists.
> Sending 437.* Sender=[UDP 188.29.165.172:29101] STACK |
> 20170809-074953.802 | reTurnServer | RETURN | 139914911389440 |
> StunMessage.cxx:1462 | Encoding stun message: *STUN Error Response:
> Allocate, id* 42a4122120c25f25602a28d9acdceb44 STACK |
> 20170809-074953.802 | reTurnServer | RETURN | 139914911389440 |
> StunMessage.cxx:1505 | *Encoding ErrorCode: 4 number=37 reason=Allocation
> Mismatch*
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