에러 Received fatal alert: bad_record_mac

[쭈니야]

안녕하세요. 네티를 이용중인 한 사용자입니다. ^^

제가 클라이언트로서 패킷 전송 시 문제가 발생되었는데

아래와 같은 에러가 발생 시 해결 방법이 궁금해서 끄적여 봅니다~~

io.netty.handler.codec.DecoderException: javax.net.ssl.SSLException: Received fatal alert: bad_record_mac

at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:299)

at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:168)

at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)

at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)

at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)

at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130)

at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)

at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)

at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)

at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)

at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)

at java.lang.Thread.run(Thread.java:745)

Caused by: javax.net.ssl.SSLException: Received fatal alert: bad_record_mac

at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)

at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1666)

at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1634)

at sun.security.ssl.SSLEngineImpl.recvAlert(SSLEngineImpl.java:1800)

at sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:1083)

at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:907)

at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:781)

at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)

at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1049)

at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:972)

at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:911)

at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:268)

... 12 more

이 에러 발생 시 상대방 서버를 재시작하면 문제가 해결되는데

왜 발생되는지...해결방법을 알고 계신분은 있으신지 궁금해서 질문드려요~~

읽어주셔서 감사합니다.