AMB チャネルをサブスクライブできないIssue Linux MID Server を使用している環境で AMB の問題が発生しています。 agent ログのエラー: Unable to subscribe to AMB channel: /mid/server/29cc65f213be67c860ee30128144b07d Wrapper ログのエラー 2019/07/16 02:34:39 | Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol, may be no appropriate cipher suite specified or protocols are deactivated 2019/07/16 02:34:39 | at com.ibm.jsse2.D.c(D.java:352) 2019/07/16 02:34:39 | at com.ibm.jsse2.as.g(as.java:383) 2019/07/16 02:34:39 | at com.ibm.jsse2.as.c(as.java:607) 2019/07/16 02:34:39 | at com.ibm.jsse2.as.wrap(as.java:172) Release すべて Cause この問題は、MID Server が標準搭載（Out of Box）の JRE ではなく、カスタム JRE を使用していることによって発生します。Wrapper ログ内のスタックトレースから、この問題はカスタム JRE（Red Hat 上の IBM JRE）を使用している場合にのみ発生することが確認されています。London リリースでは JRE が標準搭載されていなかったため、MID Server はサーバー上にインストールされているデフォルト JRE を使用します。これは wrapper-override.conf を確認することで検証できます。 Resolution MID Server を停止します。MID Server フォルダをダウンロードし、JRE を現在の Agent フォルダにコピーします。（JRE フォルダが既に存在する場合は、この手順を省略してください。）次のファイルに移動し、wrapper.java.command の設定をコメントアウトします。（この設定がカスタム JRE を指しているかどうかを確認してください。） agent/conf/wrapper-override.conf 以下の行をコメントアウトして、デフォルト JRE を使用するようにします。 wrapper.java.command={your_java_executable} 4. MID Server を再起動します。これにより、MID Server は ServiceNow が提供する標準搭載（Out of Box）の JRE を使用して起動します。 Related Links 2019/07/16 02:34:39 | [AMBClientProvider] ERROR com.snc.glide.amb.AMBHttpClient - javax.net.ssl.SSLHandshakeException: No appropriate protocol, may be no appropriate cipher suite specified or protocols are deactivated 2019/07/16 02:34:39 | java.util.concurrent.ExecutionException: javax.net.ssl.SSLHandshakeException: No appropriate protocol, may be no appropriate cipher suite specified or protocols are deactivated 2019/07/16 02:34:39 | at org.eclipse.jetty.client.util.FutureResponseListener.getResult(FutureResponseListener.java:118) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.util.FutureResponseListener.get(FutureResponseListener.java:101) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpRequest.send(HttpRequest.java:684) 2019/07/16 02:34:39 | at com.snc.glide.amb.AMBHttpClient.login(AMBHttpClient.java:99) 2019/07/16 02:34:39 | at com.snc.glide.amb.AMBHttpClient.login(AMBHttpClient.java:83) 2019/07/16 02:34:39 | at com.snc.glide.amb.AMBClient.buildHttpClient(AMBClient.java:172) 2019/07/16 02:34:39 | at com.snc.glide.amb.AMBClient.initializeBayeuxClient(AMBClient.java:134) 2019/07/16 02:34:39 | at com.snc.glide.amb.AMBClient.connect(AMBClient.java:86) 2019/07/16 02:34:39 | at com.service_now.mid.Instance.getAMBClient(Instance.java:378) 2019/07/16 02:34:39 | at com.service_now.mid.amb.AMBClientProvider.connect(AMBClientProvider.java:116) 2019/07/16 02:34:39 | at com.service_now.mid.amb.AMBClientProvider$$Lambda$38.0000000054007900.execute(Unknown Source) 2019/07/16 02:34:39 | at com.service_now.mid.amb.AMBClientProvider.executeInLock(AMBClientProvider.java:191) 2019/07/16 02:34:39 | at com.service_now.mid.amb.AMBClientProvider.lambda$initialize$7(AMBClientProvider.java:54) 2019/07/16 02:34:39 | at com.service_now.mid.amb.AMBClientProvider$$Lambda$37.000000002007B930.run(Unknown Source) 2019/07/16 02:34:39 | at java.lang.Thread.run(Thread.java:812) 2019/07/16 02:34:39 | Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol, may be no appropriate cipher suite specified or protocols are deactivated 2019/07/16 02:34:39 | at com.ibm.jsse2.D.c(D.java:352) 2019/07/16 02:34:39 | at com.ibm.jsse2.as.g(as.java:383) 2019/07/16 02:34:39 | at com.ibm.jsse2.as.c(as.java:607) 2019/07/16 02:34:39 | at com.ibm.jsse2.as.wrap(as.java:172) 2019/07/16 02:34:39 | at javax.net.ssl.SSLEngine.wrap(SSLEngine.java:18) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.flush(SslConnection.java:980) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.WriteFlusher.flush(WriteFlusher.java:429) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.WriteFlusher.write(WriteFlusher.java:323) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.AbstractEndPoint.write(AbstractEndPoint.java:380) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpSenderOverHTTP$HeadersCallback.process(HttpSenderOverHTTP.java:268) 2019/07/16 02:34:39 | at org.eclipse.jetty.util.IteratingCallback.processing(IteratingCallback.java:241) 2019/07/16 02:34:39 | at org.eclipse.jetty.util.IteratingCallback.iterate(IteratingCallback.java:224) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpSenderOverHTTP.sendHeaders(HttpSenderOverHTTP.java:62) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpSender.send(HttpSender.java:212) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpChannelOverHTTP.send(HttpChannelOverHTTP.java:85) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpChannel.send(HttpChannel.java:128) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpConnection.send(HttpConnection.java:201) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpConnectionOverHTTP$Delegate.send(HttpConnectionOverHTTP.java:253) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.send(HttpConnectionOverHTTP.java:122) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpDestinationOverHTTP.send(HttpDestinationOverHTTP.java:38) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpDestination.process(HttpDestination.java:347) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpDestination.process(HttpDestination.java:305) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpDestination.send(HttpDestination.java:295) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpDestination.succeeded(HttpDestination.java:229) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.AbstractConnectionPool.proceed(AbstractConnectionPool.java:154) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.AbstractConnectionPool$1.succeeded(AbstractConnectionPool.java:132) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.AbstractConnectionPool$1.succeeded(AbstractConnectionPool.java:124) 2019/07/16 02:34:39 | at org.eclipse.jetty.util.Promise$Wrapper.succeeded(Promise.java:130) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.onOpen(HttpConnectionOverHTTP.java:130) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.ssl.SslConnection.onOpen(SslConnection.java:251) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.AbstractEndPoint.upgrade(AbstractEndPoint.java:440) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpProxy$CreateTunnelPromise.tunnelSucceeded(HttpProxy.java:212) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpProxy$CreateTunnelPromise.lambda$tunnel$0(HttpProxy.java:182) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpProxy$CreateTunnelPromise$$Lambda$55.0000000070F81930.onComplete(Unknown Source) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:216) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:208) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:470) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.HttpReceiver.responseSuccess(HttpReceiver.java:416) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.messageComplete(HttpReceiverOverHTTP.java:316) 2019/07/16 02:34:39 | at org.eclipse.jetty.http.HttpParser.handleContentMessage(HttpParser.java:605) 2019/07/16 02:34:39 | at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:1519) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.parse(HttpReceiverOverHTTP.java:172) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.process(HttpReceiverOverHTTP.java:135) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.receive(HttpReceiverOverHTTP.java:73) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpChannelOverHTTP.receive(HttpChannelOverHTTP.java:133) 2019/07/16 02:34:39 | at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.onFillable(HttpConnectionOverHTTP.java:155) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102) 2019/07/16 02:34:39 | at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118) 2019/07/16 02:34:39 | at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:762) 2019/07/16 02:34:39 | at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:680) 2019/07/16 02:34:39 | ... 1 more 2019/07/16 02:34:45 | [AMBClientProvider] ERROR com.snc.glide.amb.AMBHttpClient - javax.net.ssl.SSLHandshakeException: No appropriate protocol, may be no appropriate cipher suite specified or protocols are deactivated 2019/07/16 02:34:45 | java.util.concurrent.ExecutionException: javax.net.ssl.SSLHandshakeException: No appropriate protocol, may be no appropriate cipher suite specified or protocols are deactivated