Created attachment 33111 [details]
Example of ServerEndpoint implementation.

Every time, when I try to transfer empty string through web socket I get an IllegalArgumentException from java.nio.Buffer#limit(int newLimit) because of negative new limit value. The reason of this issue is org.apache.tomcat.websocket.PerMessageDeflate#sendMessagePart(List<MessagePart> uncompressedParts)
line:

    // End of compressed message. Drop EOM bytes and output.
    compressedPayload.limit(compressedPayload.limit() - EOM_BYTES.length);

compressedPayload.limit() has zero value and EOM_BYES.length has value, which greater than 0.