Numerous NullPointerExceptions in AntMedia server logs (v2.4.3)

[Dalibor]

Hi everyone,

While investigating the logs from our AntMedia server (v2.4.3) running in the Azure Kubernetes, we've come across numerous "java.lang.NullPointerException" records, sometimes even happening multiple times within one minute, which is to us worrying. So far, we haven't seen any disruption of service while the exception occurs, but still we're worried that eventually we will.

The AntMedia logs showing the exceptions: 

AntMedia-2.4.3-NullPointerException-logs.log

Could anyone explain why the exceptions are happening and whether we can/should do something about that in our AntMedia implementation?

Thanks in advance!

[mustafaboleken]

Hi @Dalibor

When I check logs when your instances try to connect MongoDB, it didn't succeed the first time but on the second. For the other errors, sometimes the edge instance try to send a request to the origin but cannot send it. I couldn't see what is the request but it looks like some connection timeout error.

[Dalibor]

@mustafaboleken Thanks for the answer! So, based on your analysis, there is no fear that those errors in the logs could affect the AntMedia server's availability or its overall performance?

[mustafaboleken]

Hi @Dalibor

I said ignore it because of that it cannot get and send request to other machine, it redirect the request to other ones. I'm working on some improvement on communication between nodes. In 2 weeks, we release a new version. I will remind you to use it and let's see if it's solved or not.

[Dalibor]

Hi @mustafaboleken,

It's been a while since last update here so I wanted to share our latest testing results regarding this issue. We've monitored the logs regarding this in the latest 2 AntMedia versions we received: v2.5.1 and v2.6.0-snapshot, and unfortunately it seems the issue persist.

According to the logs, some of the NullPointerExceptions happen around midnight each day, related to the redirecting the requests between different machines (like you previously said), but some happen during a day, and are connected to the streaming itself (i.a.enterprise.webrtc.WebRTCClient).

I'll share the most recent logs with you again so you can analyze it on our end and hopefully give some insight for us in terms of those exceptions being dangerous for the AntMedia server performance and its overall stability.

The logs can be found here:

ams-server-logs-2.6.0.snapshot-nullpointerexceptions.log

Thanks in advance again for looking into this!

[Burak]

Hi @Dalibor,

I think I understood the issue. Do you send any data channel messages in your app? 

[Dalibor]

Hi @Burak,

We don't send any messages via data channel, we only use video/audio communication channels with WebRTC.