Troubleshoot CloudCenter error "Unable to communicate with orchestrator" with error 408

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Updated:April 25, 2018

Document ID:213252

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Introduction

This document describe how to troubleshoot CloudCenter error "Unable to communicate with orchestrator" with error 408

Prerequisites

Requirements

Cisco recommends that you have knowledge of these topics:

Linux Interface
Virtual Machine Environment
VIM

Components Used

Cisco recommends knowledge in:

CloudCenter appliances
CloudCenter architecture
Linux O.S.
CCM (CloudCenter Management)
CCO (CloudCenter Orchestrator)
AMQP (Advanced Message Queuing Protocol)

The information in this document was created from the devices in a specific private lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.

Problem

Power outages, unexpected restarts or network failures for long periods of time might cause CloudCenter appliance to desync. It is necessary to perform the following checks in order to know that appliances are correctly connected When configuring the orchestrator on CloudCenter Manager Graphical User Interface (CCM GUI) users might get the error as shown in the image.

When checking the CCO logs, the following error can be shown:

Caused by: java.net.ConnectException: Connection refused (Connection refused)
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
 at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
 at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
 at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
 at java.net.Socket.connect(Socket.java:589)
 at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:337)
 at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:134)
 ... 87 more
java.lang.RuntimeException: Failed to connect to CCM, please check network connection between CCM and CCO. JobId: 21912
	at com.osmosix.commons.mgmtserver.impl.MgmtServerServiceImpl.getUserCloudAccountByJobId(MgmtServerServiceImpl.java:236)
	at com.osmosix.gateway.persistence.impl.hazelcast.AbstractDistributedJobDaoImpl.find(AbstractDistributedJobDaoImpl.java:109)
	at com.osmosix.gateway.persistence.impl.hazelcast.AbstractDistributedJobDaoImpl.find(AbstractDistributedJobDaoImpl.java:17)
	at com.osmosix.gateway.lifecycle.impl.AbstractLifecycle.getJob(AbstractLifecycle.java:207)
	at com.osmosix.gateway.lifecycle.helpers.LifecycleReaper.reapApp(LifecycleReaper.java:62)
	at com.osmosix.gateway.lifecycle.helpers.LifecycleReaper.reapDeadApps(LifecycleReaper.java:45)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
	at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
	at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:748)

Solution

Is necessary restart the CloudCenter components one by one to refresh the handshake between the components

AMQP

Step 1. Log in as root

Step 2. Restart AMQP service

On all versions up to 4.8.1.2

# /etc/init.d/tomcatgua restart

On versions starting from 4.8.2

# systemctl restart rabbit

CCO

Step 1. Log in as root

Step 2. Restart CCO service

On all versions up to 4.8.1.2

# /etc/init.d/tomcat restart

On versions starting from 4.8.2

# systemctl restart cco

CCM

Step 1. Log in as root

Step 2. Restart CCM service

On all versions up to 4.8.1.2

# /etc/init.d/tomcat restart

On versions starting from 4.8.2

# systemctl restart ccm

Verify

It is important that all appliances are correctly connected, for this it is necessary to check in each one of the CloudCenter components.

CCM

Step 1. Log in as root

Step 2. Check that tomcat (previous to 4.8.2) or CCM service (post 4.8.2) are actually running

On all versions up to 4.8.1.2

[root@localhost ~]# ps -ef | grep -i tomcat

On versions starting from 4.8.2

[root@localhost ~]# systemctl status ccm

Step 3. If telnet is installed, an attempt can be made from CCO towards CCM, this will allow to understand that communication is possible

[root@cliqr-centos7-base-image ~]# telnet 10.31.127.41 8443
Trying 10.31.127.41...
Connected to 10.31.127.41.
Escape character is '^]'.

If an error occurs, then no communication is possible. This has to be fixed.

Step 4. If to configure orchestrator on CCM GUI a hostname will be used, be sure that the hostname is present in /etc/hosts file

[root@cliqr-centos7-base-image ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
127.0.0.1  devCC
10.31.127.42 CCO

AMQP

Step 1. Log in as root

Step 2. Check that there is a connection established from the AMQP to each one of the existing CCOs.

[root@localhost ~]# rabbitmqctl list_connections -p /cliqr
Listing connections ...
cliqr	10.31.127.42	33062	running
cliqr_worker	10.31.127.42	33130	running
cliqr_worker	10.31.127.59	38596	running
cliqr_worker	10.31.127.67	49781	running
cliqr_worker	10.31.127.79	49778	running
cliqr_worker	10.31.127.85	49786	running

In the previous command, the connections towards the CCO can be seen in the line with the cliqr user (in this case there is only one CCO)

In case of High Availability (HA) and AMQP under a load balancer then you'll see one connection per CCO connected with the AMQP's Load Balancer IP (In the following example there are 2 CCOs)

[root@amqp-azre1 ~]# rabbitmqctl list_connections -p /cliqr
Listing connections ...
cliqr	15.1.0.10	35788	running
cliqr	15.1.0.10	36212	running
cliqr_worker	15.1.0.10	37714	running
cliqr_worker	15.1.0.10	38362	running
cliqr_worker	15.1.0.10	41102	running

If this is not the case, restart the tomcatgua process (previous to 4.8.2) or the rabbit service (post 4.8.2)

CCO

Step 1. Log in as root

On all versions up to 4.8.1.2

[root@localhost ~]# ps -ef | grep -i tomcat

On versions starting from 4.8.2

[root@localhost ~]# systemctl status cco

Step 3. Check that connections towards the CCM are established. It should appear in CLOSE_WAIT status as well (In this case our CCM is on 10.31.127.41)

[root@cliqr-centos7-base-image ~]# netstat -anp | grep 10.31.127.41
tcp       86      0 10.31.127.42:38542      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38562      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38546      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38566      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38556      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38554      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38550      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38564      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38560      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38568      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38552      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38558      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38570      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38548      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38572      10.31.127.41:8443       CLOSE_WAIT  1330/java
tcp       86      0 10.31.127.42:38544      10.31.127.41:8443       CLOSE_WAIT  1330/java

Contributed by Cisco Engineers

Elvis Ourfali
Global TAC

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This Document Applies to These Products

CloudCenter

Troubleshoot CloudCenter error "Unable to communicate with orchestrator" with error 408

Available Languages

Bias-Free Language

Contents

Introduction

Prerequisites

Requirements

Components Used

Problem

Solution

AMQP

CCO

CCM

Verify

CCM

AMQP

CCO

Contributed by Cisco Engineers

Was this Document Helpful?

Contact Cisco

This Document Applies to These Products