Database agent doesn't start

[Anees Ur.Rahman]

Database agent doesn't start and give the below error message. port already opened to both Controller and Event service. 

main] 03 Nov 2021 14:31:07,366 INFO Agent - Agent Install Directory [/appdynamic/db-agent-21.9.0.2521]
[main] 03 Nov 2021 14:31:07,366 INFO Agent - Using Agent Version [Database Agent v21.9.0.0 GA compatible with 4.5.2.0 Build Date 2021-09-22]
[main] 03 Nov 2021 14:31:07,367 INFO Agent - JVM Runtime:
java.home=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.181-7.b13.el7.x86_64/jre
java.vm.vendor=Oracle Corporation
java.vm.name=OpenJDK 64-Bit Server VM
java.version=1.8.0_181
java.specification.version=1.8
java.runtime.version=1.8.0_181-b13
java.io.tmpdir=/tmp
user.language=en
user.country=US
user.variant=
Default locale=en_US
[main] 03 Nov 2021 14:31:07,367 INFO Agent - OS Runtime:
os.name=Linux
os.arch=amd64
os.version=3.10.0-957.el7.x86_64
user.name=aurahman
user.home=/home/aurahman
user.dir=/appdynamic/db-agent-21.9.0.2521
[main] 03 Nov 2021 14:31:07,367 INFO Agent - JVM Args : -XX:+HeapDumpOnOutOfMemoryError | -XX:OnOutOfMemoryError=kill -9 %p | -Xms1024m | -Xmx11264m |
[main] 03 Nov 2021 14:31:07,368 INFO Agent - JVM Runtime Name: 5493@apdyn-pr-da1.moh.gov.sa
[main] 03 Nov 2021 14:31:07,368 INFO Agent - JVM PID: 5493
[main] 03 Nov 2021 14:31:07,368 INFO Agent - Default Database Agent is resolving bootstrap info....
[main] 03 Nov 2021 14:31:07,418 INFO AgentUtil - Default Host Identifier Resolver using host name for unique host identifier [apdyn-pr-da1.moh.gov.sa]
[main] 03 Nov 2021 14:31:07,421 INFO AgentUtil - Default IP Address Resolver found IP addresses [[192.168.122.1, fe80:0:0:0:215:5dff:fef6:695b%eth0, 10.0.195.152]]
[main] 03 Nov 2021 14:31:07,421 INFO AgentUtil - Full Agent Registration Info Resolver found system property [appdynamics.agent.applicationName] for application name [Database Monitoring]
[main] 03 Nov 2021 14:31:07,422 INFO AgentUtil - Full Agent Registration Info Resolver found system property [appdynamics.agent.tierName] for tier name [Database Monitoring]
[main] 03 Nov 2021 14:31:07,422 INFO AgentUtil - Full Agent Registration Info Resolver found system property [appdynamics.agent.nodeName] for node name [Database Monitoring]
[main] 03 Nov 2021 14:31:07,453 INFO AgentUtil - Full Agent Registration Info Resolver using selfService [false]
[main] 03 Nov 2021 14:31:07,453 INFO AgentUtil - Full Agent Registration Info Resolver using application name [Database Monitoring]
[main] 03 Nov 2021 14:31:07,454 INFO AgentUtil - Full Agent Registration Info Resolver using tier name [Database Monitoring]
[main] 03 Nov 2021 14:31:07,454 INFO AgentUtil - Full Agent Registration Info Resolver using node name [Database Monitoring]
[main] 03 Nov 2021 14:31:07,476 INFO AgentUtil - XML Controller Info Resolver found controller host [appmon.moh.gov.sa]
[main] 03 Nov 2021 14:31:07,476 INFO AgentUtil - XML Controller Info Resolver found controller port [443]
[main] 03 Nov 2021 14:31:07,498 INFO AgentUtil - XML Agent Account Info Resolver using account name [customer1]
[main] 03 Nov 2021 14:31:07,499 INFO AgentUtil - XML Agent Account Info Resolver using account access key [****]
[main] 03 Nov 2021 14:31:07,513 INFO AgentUtil - Keystore file /appdynamic/db-agent-21.9.0.2521/conf/cacerts.jks was not found
[main] 03 Nov 2021 14:31:10,004 INFO Agent - Default Database Agent resolved bootstrap info!
[main] 03 Nov 2021 14:31:10,151 INFO Agent - Started [Default Database Agent] Schedulers
[main] 03 Nov 2021 14:31:10,151 INFO Agent - Scheduling Default Database Agent Registration ....
[DBAgent-1] 03 Nov 2021 14:31:10,245 INFO RegistrationChannel - Controller host [appmon.moh.gov.sa]; Controller port [443]
[DBAgent-1] 03 Nov 2021 14:31:10,278 INFO RegistrationChannel - setting agent hostname [apdyn-pr-da1.moh.gov.sa]
[DBAgent-1] 03 Nov 2021 14:31:10,278 INFO RegistrationChannel - setting agent version [Database Agent v21.9.0.0 GA compatible with 4.5.2.0 Build Date 2021-09-22]
[DBAgent-1] 03 Nov 2021 14:31:10,278 INFO RegistrationChannel - setting agent properties [{dbagent-name=Default Database Agent, dbagent-launch-id=e726f4a3-517c-48ea-be67-77cdc4db9688}]
[DBAgent-1] 03 Nov 2021 14:31:10,278 INFO RegistrationChannel - setting agent install dir [/appdynamic/db-agent-21.9.0.2521]
[DBAgent-1] 03 Nov 2021 14:31:10,278 INFO RegistrationChannel - setting agent type [DB_AGENT]
[DBAgent-1] 03 Nov 2021 14:31:10,279 INFO RegistrationChannel - setting agent application [Database Monitoring]
[DBAgent-1] 03 Nov 2021 14:31:10,279 INFO RegistrationChannel - setting agent tier name [Database Monitoring]
[DBAgent-1] 03 Nov 2021 14:31:10,279 INFO RegistrationChannel - setting agent node name [Database Monitoring]
[DBAgent-1] 03 Nov 2021 14:31:10,279 INFO RegistrationChannel - Sending Registration request
[DBAgent-1] 03 Nov 2021 14:31:44,386 ERROR ControllerHttpRequestResponse - Fatal transport error while connecting to URL [/controller/instance/UNKNOWN_MACHINE_ID/systemagentregistration]: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake
[DBAgent-1] 03 Nov 2021 14:31:44,387 WARN RegistrationChannel - Could not connect to the controller/invalid response from controller, cannot get registration information
[DBAgent-1] 03 Nov 2021 14:32:04,391 INFO RegistrationChannel - Controller host [appmon.moh.gov.sa]; Controller port [443]
[DBAgent-1] 03 Nov 2021 14:32:04,391 INFO RegistrationChannel - setting agent hostname [apdyn-pr-da1.moh.gov.sa]
[DBAgent-1] 03 Nov 2021 14:32:04,391 INFO RegistrationChannel - setting agent version [Database Agent v21.9.0.0 GA compatible with 4.5.2.0 Build Date 2021-09-22]
[DBAgent-1] 03 Nov 2021 14:32:04,391 INFO RegistrationChannel - setting agent properties [{dbagent-name=Default Database Agent, dbagent-launch-id=e726f4a3-517c-48ea-be67-77cdc4db9688}]
[DBAgent-1] 03 Nov 2021 14:32:04,391 INFO RegistrationChannel - setting agent install dir [/appdynamic/db-agent-21.9.0.2521]
[DBAgent-1] 03 Nov 2021 14:32:04,392 INFO RegistrationChannel - setting agent type [DB_AGENT]
[DBAgent-1] 03 Nov 2021 14:32:04,392 INFO RegistrationChannel - setting agent application [Database Monitoring]
[DBAgent-1] 03 Nov 2021 14:32:04,392 INFO RegistrationChannel - setting agent tier name [Database Monitoring]
[DBAgent-1] 03 Nov 2021 14:32:04,392 INFO RegistrationChannel - setting agent node name [Database Monitoring]
[DBAgent-1] 03 Nov 2021 14:32:04,392 INFO RegistrationChannel - Sending Registration request
[DBAgent-1] 03 Nov 2021 14:32:40,544 INFO Agent - Full certificate chain validation performed using default certificate file
[DBAgent-1] 03 Nov 2021 14:32:40,755 ERROR ControllerHttpRequestResponse - Fatal transport error while connecting to URL [/controller/instance/UNKNOWN_MACHINE_ID/systemagentregistration]: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake

[Ryan.Paredez]

Hi @Anees Ur.Rahman,

Please check out this existing post Problem in DB agent installation and let me know if it helps!

[Anees Ur.Rahman]

provided solution doesnt work and also i want to make a script to the db agent automaticllay whenever the server starts up.

[Ryan.Paredez]

Hi, @Anees Ur.Rahman 

Thank you for letting me know. Let's see if the community can jump in and help. If you happen to find a solution yourself, please do come back and share the learnings here!

[saurav.kosankar]

Hi Anees ,

My DB agent also does't start can you help me if you get the solutions.

Regards,

Saurav

[Ryan.Paredez]

Hi @saurav.kosankar - here is an existing thread. Check it out to see if it helps.

https://community.appdynamics.com/t5/Infrastructure-Server-Network/Problem-with-DB-agent-installatio...