Oracle SOA Suite 11g Troubleshooting Methodology

Oracle SOA Suite 11g Troubleshooting Methodology

April 10th, 2013

16:15-17:15

Mile High Ballroom 3C

Harold Dost III Senior Consultant

Raastech, Inc.

Slide 2 of 64 © Raastech, Inc. 2012 | All rights reserved.

1. Introduction

2. The Problem

3. The Art of Troubleshooting: Where Do You Start?

4. Infrastructure Issues

5. Performance Issues

6. Deployment Issues

7. Summary

Agenda


INTRODUCTION


Harold Dost III

5+ years of Oracle middleware experience

Experience in large implementations involving SOA Suite, BAM, AIA,

OSB, OSR, ODI, OWSM, OER, OEG, and more

OCE (SOA Foundation Practitioner)

About Me


THE PROBLEM


The Macy’s support team had an exceedingly difficult time

pinpointing the specific cause of the problem.

Not only did the team involve representatives for each IT

functional area, they had no way to troubleshoot from the

source and no one team had visibility of the complete

picture.

In general resolving problems took the Macy’s melded

support team approximately multiple days.

http://www.splunk.com/web_assets/pdfs/secure/Troubleshooting_Critical_Applications.pdf

How Every Large Company Troubleshoots


The Macy’s support team had an exceedingly difficult time

pinpointing the specific cause of the problem.

Not only did the team involve representatives for each IT

functional area, they had no way to troubleshoot from the

source and no one team had visibility of the complete

picture.

In general resolving problems took the Macy’s melded

support team approximately multiple days.

http://www.splunk.com/web_assets/pdfs/secure/Troubleshooting_Critical_Applications.pdf

How Every Large Company Troubleshoots


In the past, network admins were to blame for everything.

Problem With Troubleshooting Integrations


In the 21st century, the integration folks are the new target.

Problem With Troubleshooting Integrations


Numerous touch points

Numerous SOA technologies

Focus of this presentation is on Oracle SOA Suite 11g

Problem With Troubleshooting Integrations W

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We created an Ant wrapper script that loops through and

deploys all composites

Calls the deploy target in ant-sca-deploy.xml

Always getting OutOfMemoryError: PermGen space

after exactly 66 composite deployments

Weird… but at least consistent

Real World Scenario – Bizarre Behaviour


Real World Scenario – Vague & Unclear

The infamous and ever misleading “Unable to access the

following endpoints” error


Could be:

Caused by: java.net.SocketTimeoutException:

Read timed out

Message send failed:

sun.security.validator.ValidatorException:

PKIX path building failed:

sun.security.provider.certpath.SunCertPathBu

ilderException: unable to find valid

certification path to requested target

Real World Scenario – Vague & Unclear


THE ART OF TROUBLESHOOTING: WHERE DO YOU START?


Part skill

Some people have natural tendency to pinpoint problem areas

Can be learned; usually involves methodical approach and logic

Part knowledge

Without understanding the product, doesn’t matter how smart

you are

Most frustrating when it’s related to an area we don’t know

What is Troubleshooting?


Co-Workers

Internet searches

OTN discussion forums http://support.oracle.com

My Oracle Support http://support.oracle.com

Oracle Troubleshooting Guide

http://docs.oracle.com/cd/E15586_01/fusionapps.1111/e14496/soa_trouble.htm

Oracle SOA Suite 11g Administrator’s Handbook http://www.packtpub.com/oracle-soa-suite-11g-administrators-handbook/book

Existing Resources

http://www.packtpub.com/oracle-soa-suite-11g-administrators-handbook/book












Start Somewhere – Narrow Down Problem Area

Issues

Performance

Server-wide Service-specific

Runtime

Composite Infrastructure

Deployment


INFRASTRUCTURE ISSUES


Could be a server issue

Could be a coding issue

Could be a business fault that should be handled by the code

Must be able to differentiate between infrastructure errors

and composite instance errors

Troubleshooting the Infrastructure


1. Use logs

2. Use thread dumps

Troubleshooting the Infrastructure


The soa_server1.out log file contains most runtime

issues

Must differentiate between infrastructure errors and

composite instance errors

1. Using Logs


Random crashes immediately after go-live

Only happened in Production

No warning signs

Error does not appear on the EM console

Example: Infrastructure Error

<Aug 5, 2011 12:00:02 AM EDT> <Error>

<oracle.soa.bpel.engine.dispatch> <BEA-000000>

<failed to handle message

javax.ejb.EJBException: EJB Exception:

java.lang.StackOverflowError...


Often easy to distinguish

Should be handled by the code

Shows as a faulted instance on the EM console

Example: Business Fault

<Aug 6, 2011 10:10:33 AM EDT> <Error>

<oracle.soa.mediator.serviceEngine> <BEA-000000>

<Got an exception:

oracle.fabric.common.FabricInvocationException:

javax.xml.ws.soap.SOAPFaultException:

Message: Organization 129024 not found. Stack trace: at

Core.WebServices.Message.MessageWebService.SaveNotification(O

rganization organization, Notification notification) in

c:\Data\1.0\Core\Message\MessageWebService.svc.cs:line 100,

detail=javax.xml.ws.soap.SOAPFaultException:


Thrown by external system

No action needed

Shows as a faulted instance on the EM console

No action needed; follow up with target system

Example: System Fault (but not your fault!)

<Aug 6, 2011 10:10:33 AM EDT> <Error>

<oracle.soa.mediator.serviceEngine> <BEA-000000>

<Got an exception:

oracle.fabric.common.FabricInvocationException:

javax.xml.ws.soap.SOAPFaultException:

CreateCustomer failed with Message: Cannot insert the value

NULL into column 'CustomerID', table '@Customers'; column

does not allow nulls. INSERT fails.


The infamous and ever misleading “Unable to access the

following endpoints” error

Example: System Fault


In this case, due to:

Message send failed:

sun.security.validator.ValidatorException:

PKIX path building failed:

sun.security.provider.certpath.SunCertPathBu

ilderException: unable to find valid

certification path to requested target

Example: System Fault


Just an infrastructure warning

Threads would eventually clear themselves up

Does not show on the EM console

Due to failed transaction that continues to retry

Example: Coding or Infrastructure Problem?

<Sep 30, 2011 11:30:04 PM EDT> <Warning>

<oracle.integration.platform.instance.store.async> <BEA-000000>

<Unable to allocate additional threads,

as all the threads [10] are in use.

Threads distribution :

Fabric Instance Activity = 1,Fabric-Instance-Manager = 9,>


A lot more information is logged in the soa_server1-

diagnostic.log file

Modifying Logger Levels


A lot more information is logged in the soa_server1-

diagnostic.log file

Modifying Logger Levels

[2012-01-01T22:35:56.144-05:00] [soa_server1] [TRACE] [] [oracle.soa.adapter]

[ecid: cb680017c6a0acfe:-3f1527ec:13487d1ea4c:-8000-0000000000000fe1,0:2]

JmsProducer_execute:[default destination = jndi/CustomerJMSQueue]:

Successfully produced message.

[2012-01-01T22:35:56.256-05:00] [soa_server1] [NOTIFICATION] [] [oracle.soa.adapter]

[ecid: cb680017c6a0acfe:-5675273b:1348cccad75:-8000-0000000000055743,0]

JMSAdapter JMSConsumer JMSMessageConsumer_consume: Got message with ID

ID:<458362.1325475356144.0> from destination jndi/CustomerJMSQueue

[2012-01-01T22:35:56.261-05:00] [soa_server1] [TRACE] [] [oracle.soa.adapter]

[ecid: cb680017c6a0acfe:-5675273b:1348cccad75:-8000-0000000000055743,0]

JMS Adapter JMSProducer:CustomerJMS [ CustomerProduce_ptt::CustomerProduce(body)

] XMLHelper_convertJmsMessageHeadersAndPropertiesToXML:

<JMSInboundHeadersAndProperties xmlns="http://xmlns.oracle.com/pcbpel/

adapter/jms/">[[

<JMSInboundHeaders>

<JMSMessageID>ID:<458362.1325475356144.0></JMSMessageID>

<JMSTimestamp>1325475356144</JMSTimestamp>


When a managed server goes into warning state, what are

you supposed to do?

2. Using Thread Dumps


Navigate to Servers > (managed server) > Monitoring >

Threads

Understanding Stuck Threads


AdminServer.log

bam_server1.log


####<Dec 23, 2011 6:03:49 PM EST> <Error> <WebLogicServer>

<soahost1> <AdminServer> <BEA-000337> <[STUCK] ExecuteThread: '0'

for queue: 'weblogic.kernel.Default (self-tuning)' has been busy

for "658" seconds

####<Dec 23, 2011 5:53:36 PM EST> <Error> <JMX> <soahost1> <bam_

server1> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.

Default (self-tuning)'> <<WLS Kernel>> <> <> <1324680816405> <BEA-

149500> <An exception occurred while registering the MBean

com.bea:Name=AdminServer,Type=WebServiceRequestBufferingQueue,

WebServiceBuffering=AdminServer,Server=AdminServer,

WebService=AdminServer. java.lang.OutOfMemoryError: PermGen space


1. We found AdminServer to be in the “Warning” state, due

to a stuck thread.

2. We confirmed that there was indeed a stuck

“ ExecuteThread ” as shown on both the Oracle

WebLogic Administration Console and the AdminServer.log file.

3. By reviewing the soa_server1.log and

bam_server1.log files, we found startup errors in the

BAM server log.

4. The BAM server was unable to register an AdminServer MBean due to the java.lang.OutOfMemoryError

exception that was thrown.



PERFORMANCE ISSUES


Is logging in to Oracle Enterprise Manager Fusion

Middleware Control extremely slow?

Are all composite instances completing in an unusually

longer period of time?

Are the logs or your dehydration database growing

unusually quickly?

Are you seeing an exceptionally high number of errors in

the logs?

Server Wide Performance Issues


root@soahost1:/root> df –m

Filesystem 1M-blocks Used Available Use% Mounted on

/dev/sda8 996 451 494 48% /

/dev/sda9 815881 697454 76314 91% /u01

/dev/sda7 996 36 909 4% /home

/dev/sda5 1984 138 1744 8% /tmp

/dev/sda3 1984 283 1598 16% /var

/dev/sda2 5950 3842 1802 69% /usr

/dev/sda1 99 12 83 13% /boot

tmpfs 8023 0 8023 0% /dev/shm

Check available disk space

Often an overlooked area


The vmstat command easily outputs CPU, memory, and I/O

statistics

Do not rely on Linux’s reporting of available memory, and

best to look at SWAP space usage

Why Linux reports 100% memory usage all the time

http://blog.raastech.com/2008/01/why-linux-reports-100-memory-usage-all.html

Check CPU, RAM, and I/O

root@soahost1:/root> vmstat -S m

procs -------memory--------- --swap-- ---io-- --system-- ----cpu-----

r b swpd free buff cache si so bi bo in cs us sy id wa st

0 0 0 59 402 15055 0 0 2 16 0 0 2 2 96 1 0


System log files can reveal resource issues:

Check OS Resources

root@soahost1:/root> cat /var/log/messages

Aug 31 20:53:22 uslx286 sshd[22480]: fatal:

setresuid 10000: Resource temporarily unavailable

root@soahost1:/root> ps -A | wc -l

297

root@soahost1:/root> lsof | wc -l

6064

Too many open files can exhaust system resources:

Too many running processes can exhaust system resources:


For performance, consider the following:

Switching from Sun JDK to JRockit JDK

Optimizing JVM settings

Additional JVM performance tuning documentation from

Oracle can be found at:

http://docs.oracle.com/cd/E23943_01/web.1111/e13814.pdf

http://docs.oracle.com/cd/E15289_01/doc.40/e15060.pdf

JVM Performance Tuning


Add this to the PORT_MEM_ARGS, argument in the setSOADomainEnv.sh(.cmd) script

-XX:+HeapDumpOnOutOfMemoryError

Although this is not a performance setting, we recommend

setting it to dump the heap to an hprof file when java.lang.OutOfMemoryError exceptions are thrown

This is useful for later analysis and troubleshooting

JVM Logging


Ensuring that the heap allocated to the JVM is appropriately

sized (that is, comparing heap versus non-heap usage)

Ensure that there is no excessive garbage collection

Monitor JVM thread performance

Check JVM


Data source errors are usually easy to identify – when

exhausted, errors show up everywhere

Check Data Sources


Involve a DBA

Check Database Performance


Navigate to Monitoring > Performance Summary

Can choose metrics to display for any composite

Viewing Performance Summary Graphs


Right-click on Monitoring > Request Processing

Utilizing SQL queries is so much better

Viewing Request Processing Metrics


Remember SQL output from last page?

Let’s also get the invoke durations

Composite Instance Performance

SELECT

composite_instance_id,

composite_creation_date,

component_name,

action,

component_state,

TO_CHAR((TO_NUMBER(SUBSTR(TO_CHAR(updated_time-created_time),12,2))*60*60) +

(TO_NUMBER(SUBSTR(TO_CHAR(updated_time-created_time),15,2))*60) +

TO_NUMBER(SUBSTR(TO_CHAR(updated_time-created_time),18,4)),'999990.000') duration

FROM

mediator_instance

WHERE

component_name = 'Order.Create’


DEPLOYMENT ISSUES


Involves:

1. Compilation

ant -f ant-sca-package.xml package -

DcompositeDir=$CODE/HelloWorld -

DcompositeName=HelloWorld -Drevision=1.0

2. Deployment

ant -f ant-sca-deploy.xml deploy -

DserverURL=$SOAURL/soa-infra/deployer -

Duser=$USERNAME -Dpassword=$PASSWORD -

DsarLocation=$CODE/HelloWorld/deploy/sca_HelloWorl

d_rev1.0.jar -Dpartition=default -Doverwrite=true

-DforceDefault=true

Understanding the Ant Deployment Process


Compilation done via the package target in ant-sca-

package.xml

The package target calls other targets to perform:

1. Cleanup

2. Validation

3. Compilation

Understanding the Ant Compilation Process


Removes any existing SAR files

Compilation: The init Target

clean:

[echo] deleting

/u01/svn/HelloWorld/deploy/sca_HelloWorld_rev1.0.jar


Sets environment variables and validates all resources

within the code

Compilation: The scac-validate Target

scac-validate:

[echo] Running scac-validate in

/u01/svn/HelloWorld/composite.xml

[echo] oracle.home =

/u01/app/oracle/middleware/Oracle_SOA1/bin/..

[input] skipping input as property compositeDir has already

been set.

[input] skipping input as property compositeName has already

been set.

[input] skipping input as property revision has already been

set.


Compiles the code

Compilation: The scac Target

scac:

[scac] Validating composite "/u01/svn/HelloWorld/composite.xml"

[scac] error: location

.

Load of wsdl "HelloWorldWebService.wsdl with Message part

element undefined in wsdl [file:/u01/svn/HelloWorld/

.

[echo]

[echo] ERROR IN TRYCATCH BLOCK:

[echo] /u01/scripts/build.soa.xml:112: The following

error occurred while executing this line:

.

[echo] /u01/app/oracle/middleware/Oracle_SOA1/bin/ant-sca-

compile.xml:269: Java returned: 1 Check log file : /tmp/out.err

for errors


Understand that ant runs on the client machine, not the SOA

server [echo] /u01/app/oracle/middleware/Oracle_SOA1/bin/ant-sca

deploy.xml:188: java.lang.OutOfMemoryError: PermGen space

Compilation errors, check out.err and understand adf-

config.xml

oracle.fabric.common.wsdl.SchemaBuilder.loadEmbeddedSchemas

(SchemaBuilder.java:492) Caused by: java.io.IOException:

oracle.mds.exception.MDSException: MDS-00054: The file to be

loaded oramds:/apps/Common/HelloWorld.xsd does not exist.

Deployment errors are usually straightforward [deployComposite] INFO: Creating HTTP connection to

host:soahost1, port:8001

[deployComposite] java.net.UnknownHostException: soahost1

Types of Errors


Located in Unix/Linux:

/tmp/out.err

Located in Microsoft Windows:

C:\Users\[user]\AppData\Local\Temp\out.err

Location of out.err


OTHER STUFF


DMS Spy Servlet displays instant Dynamic Monitoring

Service (DMS) related metrics

Navigate to http://<host>:<soaport>/dms/Spy

http://docs.oracle.com/cd/E15586_01/core.1111/e10108/monitor.htm#CFAHIAIB

The DMS Spy Servlet


The EDN Database Debug Log can be accessed at:

http://<host>:<soaport>/soa-infra/events/edn-db-log

Changing the oracle.integration.platform.blocks.event.saq

logger to TRACE:32 captures the body of the event

message is available in the EDN trace

Check Event Delivery Network (EDN)


SUMMARY


Troubleshooting is part art, part product knowledge

Oracle SOA Suite 11g errors can mostly be classified into:

Runtime (or infrastructure) errors

Performance issues/errors

Deployment errors

Summary


For infrastructure errors:

Identify whether it is a composite or an infrastructure error

Consider increasing logger levels

Identifying the root cause of stuck threads may require some

drill-down investigation

Summary


For performance issues:

Identify whether it is a server-wide performance issue, or

specific to a single composite

Check overall system health, even the obvious areas

Obtaining composite instance performance metrics is easily

done through SQL

Summary


For deployment errors:

Understand the ant compilation (i.e., packaging) and

deployment processes

Understand adf-config.xml

Summary


Oracle SOA Suite 11g Administrator’s

Handbook

http://www.packtpub.com/oracle-soa-suite-11g-

administrators-handbook/book

Chapter 6: Troubleshooting the Oracle

SOA Suite 11g Infrastructure

“Highly recommended, a tour de

force.”

~Mark Nelson, Oracle A-Team

Book

http://redstack.wordpress.com/2012/10/28/a-review-of-oracle-soa-suite-11g-administrators-handbook/


Harold Dost III

Senior Consultant

[email protected]

@hdost

Contact Information

mailto:[email protected]


Session #:185

Oracle SOA Suite 11g Troubleshooting Methodology

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