Issue in connecting apache and tomcat agent with collector

Hi,

We are facing issue in connecting the apache agents to connect the Dynatrace collector.

We checked the following options

1. Both the host and DT collector are on same network

2. There is no Firewall issue.

3. DT collector and the server is running with latest DT version 6.1.0.8387

4. There is no Collector grouping, also tried by removing the collectorlist.* from the dir.

Please suggest us the solution.

From Tomcat log, I saw following:

2016-01-12 09:19:01 [04e71815] info [native] Trying to connect to rgh3n0c:11023 for up to 60 seconds

2016-01-12 09:19:01 [04e71815] info [native] Connected successfully

2016-01-12 09:19:01 [04e71815] info [native] Server requests us to use Agent 6.1.0.8387 with a hash of 7c22b0ce964cc1d4f901baaf536466be

2016-01-12 09:19:01 [04e71815] info [native] Agent already available locally

2016-01-12 09:19:01 [04e71815] info [native] Loading Agent /xjp/dynatrace/agent/linux-x86-64/agent/downloads/6.1.0.8387/native/linux-x86-64/libdtagentcore.so

2016-01-12 09:19:01 [04e71815] info [native] POSIX clock type CLOCK_MONOTONIC detected

2016-01-12 09:19:01 [04e71815] info [native] Loading collector peer list from /xjp/dynatrace/agent/linux-x86-64/agent/conf/collectorlist.bxpcnj_tomcat-qa-xjp-rest.partition_r003ytn0c

2016-01-12 09:19:01 [04e71815] info [native] POSIX clock type CLOCK_MONOTONIC detected

…

2016-01-12 09:19:01 [04e71815] info [native] Agent name .................. bxpcnj_tomcat-qa-xjp-rest.partition_r003ytn0c

2016-01-12 09:19:01 [04e71815] info [native] Server/Collector ............ rgh3n0c:9998

2016-01-12 09:19:01 [04e71815] info [native] Interface type .............. JVMTI

2016-01-12 09:19:01 [04e71815] info [native] Process ID .................. 10344

2016-01-12 09:19:01 [04e71815] info [native] JVM name .................... Java HotSpot(TM) 64-Bit Server VM 23.21-b01

2016-01-12 09:19:01 [04e71815] info [native] JVM vendor .................. Oracle Corporation

2016-01-12 09:19:01 [04e71815] info [native] JVM info .................... mixed mode, sharing

2016-01-12 09:19:01 [04e71815] info [native] Detected application server: Apache Tomcat

2016-01-12 09:19:01 [04e71815] info [native] Could not retrieve LoadBalancing configuration from rgh3n0c:9998 (111): Connection refused

2016-01-12 09:19:01 [04e71815] info [native] Trying to connect to Server/Collector for up to 19 seconds

2016-01-12 09:19:21 [04e71815] severe [native] Exception while connecting to collector, info:<connect()/apr_socket_connect(), 111, Connection refused>

@

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Though there is no Collector grouping, we removed the collectorlist.* from the dir and tried but it results the same.

2016-01-13 16:01:35 [8a1fa8fe] info [native] Could not retrieve LoadBalancing configuration from rgh3n0c:9998 (111): Connection refused

2016-01-13 16:01:35 [8a1fa8fe] info [native] Trying to connect to Server/Collector for up to 19 seconds

2016-01-13 16:01:55 [8a1fa8fe] severe [native] Exception while connecting to collector, info:<connect()/apr_socket_connect(), 111, Connection refused>

2016-01-13 16:01:55 [8a1fa8fe] warning [native] Unable to register with Server/Collector rgh3n0c:9998, CONTINUING WITHOUT INSTRUMENTATION.

Thanks

Karthik