Could not initialize class org.jitsi.sctp4j.Sctp

[webintoit]

Hello, guys.
One of video-bridges time by time goes down with unexpected error.

SEVERE 2018-01-29 11:29:27.238 SEVERE: [1988649] util.UtilActivator.uncaughtException().122 An uncaught exception occurred in thread=Thread[org.jitsi.videobridge.SctpConnection-pool-8-thread-1,5,main] and message was: Could not initialize class org.jitsi.sctp4j.Sctp
java.lang.NoClassDefFoundError: Could not initialize class org.jitsi.sctp4j.Sctp
at org.jitsi.videobridge.SctpConnection$1.run(SctpConnection.java:476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

Sometimes i can see

bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.
media_jvb2.1.1j55b6svij7l@proficonf3    | bad format.

Sometimes i can see

SEVERE 2018-02-01 16:36:55.422 SEVERE: [3648489] org.jitsi.videobridge.EndpointMessageTransport.log() Failed to send a message over a WebRTC data channel (endpoint=webrkwbf6llmrkwbf6lLM): 
java.io.IOException: Failed to send the data
at org.jitsi.videobridge.WebRtcDataStream.sendString(WebRtcDataStream.java:146)
at org.jitsi.videobridge.EndpointMessageTransport.sendMessage(EndpointMessageTransport.java:230)
at org.jitsi.videobridge.EndpointMessageTransport.sendMessage(EndpointMessageTransport.java:207)
at org.jitsi.videobridge.EndpointMessageTransport.sendMessage(EndpointMessageTransport.java:194)
at org.jitsi.videobridge.EndpointMessageTransport.sendMessage(EndpointMessageTransport.java:648)
at org.jitsi.videobridge.Endpoint.sendMessage(Endpoint.java:531)
at org.jitsi.videobridge.Conference.sendMessage(Conference.java:334)
at org.jitsi.videobridge.EndpointMessageTransport.onClientEndpointMessage(EndpointMessageTransport.java:370)
at org.jitsi.videobridge.EndpointMessageTransport.onJSONData(EndpointMessageTransport.java:294)
at org.jitsi.videobridge.EndpointMessageTransport.onMessage(EndpointMessageTransport.java:619)
at org.jitsi.videobridge.EndpointMessageTransport.onStringData(EndpointMessageTransport.java:584)
at org.jitsi.videobridge.Endpoint.onStringData(Endpoint.java:453)
at org.jitsi.videobridge.WebRtcDataStream.onStringMsg(WebRtcDataStream.java:122)
#...
Sctp send error: : Resource temporarily unavailable

In most cases:

I`m using jvb 1013