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twitter-archive / cloudhopper-smpp

Efficient, scalable, and flexible Java implementation of the Short Messaging Peer to Peer Protocol (SMPP)
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EnquireLink, SmppTimeoutException #134

Open DmitryTen opened 6 years ago

DmitryTen commented 6 years ago

Hi!

There is a question about EnquireLink I use following code to maintain session:

        try {
            session.enquireLink(new EnquireLink(), TimeUnit.SECONDS.toMillis(10));
        } catch (SmppTimeoutException e) {
            log.error("elink exception", e);
            ...
        }

It worked fine for few years, but from recent time i'm experiencing with SmppTimeoutException. SmppTimeoutException is thrown, BUT tcpdump shows the response for EnquireLink was successfully received.

here it is StackTrace: 2018-03-22 08:51:26.475 ERROR [pool-21-thread-1] (ElinkTask.java:47) - elink exception com.cloudhopper.smpp.type.SmppTimeoutException: Unable to get response within [10000 ms] at com.cloudhopper.smpp.impl.DefaultSmppSession.sendRequestAndGetResponse(DefaultSmppSession.java:471) at com.cloudhopper.smpp.impl.DefaultSmppSession.enquireLink(DefaultSmppSession.java:439) at ru.cwt.message.utils.ElinkTask.run(ElinkTask.java:38) ...

here it is tcpdump request/response: image

i use cloudhopper-smpp version 5.06.

Question is following: Is this a known bug? If it's not a bug, what could be a reason? If it is a bug was it fixed in further versions?

Thanks a lot. With Regards, Dmitriy.