Connection to host failed: Read time out

[CommunityUser]

Hi,

my Java appagent have trouble to connect to the controller. It starts up just fine (2017-06-02 11:48:01.371::INFO: Started AppDynamics Java Agent Successfully.) but after a while i got following exception in the agent log.

[AD Thread Pool-Global1] 02 Jun 2017 11:51:55,352 ERROR ConfigurationChannel - Exception: Connect to loki:8090 [loki/172.16.50.38] failed: Read timed out 
org.apache.http.conn.ConnectTimeoutException: Connect to loki:8090 [loki/172.16.50.38] failed: Read timed out
        at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:134)
        at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:319)
        at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363)
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:219)
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86)
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
        at com.singularity.ee.util.httpclient.m.a(m.java:290)
        at com.singularity.ee.util.httpclient.m.a(m.java:205)
        at com.singularity.ee.rest.d.D(d.java:387)
        at com.singularity.ee.rest.d.C(d.java:340)
        at com.singularity.ee.rest.controller.request.b.C(b.java:111)
        at com.singularity.ee.rest.controller.request.c.a(c.java:35)
        at com.singularity.ee.agent.appagent.kernel.config.xml.k.a(k.java:1320)
        at com.singularity.ee.agent.appagent.kernel.config.xml.k.a(k.java:110)
        at com.singularity.ee.agent.appagent.kernel.config.xml.r.a(r.java:629)
        at com.singularity.ee.agent.appagent.kernel.config.xml.k.a(k.java:409)
        at com.singularity.ee.agent.appagent.kernel.config.xml.B.run(B.java:612)
        at com.singularity.ee.util.javaspecific.scheduler.n.run(n.java:122)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at com.singularity.ee.util.javaspecific.scheduler.y.e(y.java:335)
        at com.singularity.ee.util.javaspecific.scheduler.a.b(a.java:152)
        at com.singularity.ee.util.javaspecific.scheduler.b.a(b.java:119)
        at com.singularity.ee.util.javaspecific.scheduler.b.b(b.java:206)
        at com.singularity.ee.util.javaspecific.scheduler.b.run(b.java:236)
        at com.singularity.ee.util.javaspecific.scheduler.i.a(i.java:694)
        at com.singularity.ee.util.javaspecific.scheduler.i.run(i.java:726)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
        at java.net.SocketInputStream.read(SocketInputStream.java:170)
        at java.net.SocketInputStream.read(SocketInputStream.java:141)
        at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
        at sun.security.ssl.InputRecord.read(InputRecord.java:503)
        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
        at com.singularity.ee.util.httpclient.c.createLayeredSocket(c.java:148)
        at com.singularity.ee.util.httpclient.c.connectSocket(c.java:193)
        at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:125)
        ... 29 more

 I also checkt the connection to the controller with "telnet loki 8090". Connection OK

Thanks in advanced

[Severin_Neumann]

One possible root cause might be that you have enabled SSL in your configuration but you are talking to the default non-SSL port. Can you double-check your configuration if SSL is disabled? For mor details, have a look into the documentation:

https://docs.appdynamics.com/display/PRO43/Java+Agent+Configuration+Properties#JavaAgentConfiguratio...

[CommunityUser]

So I double-checked (both sides, controller and appagent) my controller-info.xml and the " <controller-ssl-enabled> " was default set to false. I restarted my Java Application and added the javaagent.jar with " java -Xbootclasspath/a:/<path to java>/java/lib/tools.jar -jar /<path to appDynamics>/appagent/javaagent.jar <PID>" to the running JVM, but still the same exception.

I can't explain it but somehow it worked after i reinstalled the appagent on my mashine. (configfile did not changed)