Mapping: JCO Communication Failure

Hi Experts,
I am working on a scenario PROXY<-->PI<-->SOAP.
When i trigger the proxy from SPROXY, the message gets stuck in PI with an error Mapping: JCO Communication Failure. I have checked the RFC destinations AI_RUNTIME_JCOSERVER and AI_VALIDATION_JCOSERVER in the PI system, both of which are successfully connected. the correct entiry is also maintaine in sxmb_adm.
I am not sure what could be the issue otherwise. I am not sure if we are missing any configuration on the PI side.
Any idea how can i get this resolved.
Thanks in advance.
Regards
Tanzoom

Hi Tanzoom,
You get this kind of error when there are lots of messages to be processed simultaneously. Every message mapping needs one connection. If all 10 available connections are blocked from other messages you get this kind of error. Try increasing the the number of processes in VisualAdmin.
Also refer this below blog
http://scn.sap.com/blogs/saprouter/2012/08/07/jcocommunicationfailure
Best Regards,
Monikandan.

Similar Messages

System Error due to JCO communication failure? during mapping

in my JDBC-XI-Proxy scenario,
there is BPM with a transformation step,
in that step, during execution it gives Jco failure error, and particularly when the payload is very large....
my question is:
1. how JCo communication failure occurs in case of mapping??
2. why its only when the payload is huge??

Sudheep,
1, The Mapping is alaways executed in the Java Stack. And so win the runtime there needs to be a connection between the ABAP stack and the Java Stack for the Mapping to get exectued. The TCP IP Connection AI_RUNTIME_JCOSERVER is used for this purpise in SM59.
2. When the payload is huge , there can be a over flow of the java Heap memory and this needs to be increased. Ask your Basis team to increase the java heap size if you do not want to face this issue.
Regards
Bhavesh

Random JCO Communication Failure Error after Hardware Migration

Greetings experts,
we had a migrated our XI server to new hardware and had couple of SLD related issues which were solved by the migration team. However, we are getting JCO communication failure very frequent whenever we use JCO from JAVA to call an RFC. The weird thing, if you restarted the message it will be successful.
The error message in the message monitor :
"COMMUNICATION FAILURE" during JCo call. Error opening an RFC connection"
Any idea to solve this random issue?

Hi again,
the number of connection was increased to 200 but with no effects. Also, the user used to connect is a system user which does not need a ticket.
This is my connection code
               mConnection = JCO.createClient("600", // Client
          "USER", // Username
          "PASSWORD", // Password
          "EN", // Language
          "hostname", // Host
          "01"); // System Number
do I need to add anything else if I am using a clustered system?

Random JCO Communication Failure Error

Dear All,
I am facing the weird issue of JCo connection failures. I am facing the error of Max no of conversations excedeed. If i am testing it then it is giving me error. But after some time if i check it again it will be successful and also ping will be also successful for the JCo. I am facing for all JCo which we have created in the Portal System.
We have 3 landscape system here. In my Development and Quality this type of error is coming which is very randomly.
In our Production server its not coming.
So i am very confused why this type of random behaviour is of JCo Connection.
Regards,
Dhruv Shah

Hi Dhruv,
If you are using WD application, then you should use disconnectIfAlive() in finally block of try-catch while executing RFC model.
Please check the Web Dynpro Best Practices: [How to Configure the JCo Destination Settings|https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/user-interface-technology/wd%20java/7.0/portal%20integration/how%20to%20configure%20the%20jco%20destination%20settings.pdf] that will helps you identify maximum pool size, connections and timeout etc.
Also refer to JCo Pool Configuration and http://help.sap.com/saphelp_nw04/helpdata/en/3a/3b1b40fcdd8f5ce10000000a155106/content.htm
Hope it helps
Regards
Arun

Error in BPM: "COMMUNICATION FAILURE" during JCo call. Error opening an RFC

hello experts
i am receiving the above error incase of BPM scenario where i am having a Transform step and synchronous RFC step.
i referred to the few threads discussing such problems and was trying to find whether my mapping is correct and i tested my mappings using my payload which looks good.
When looked into the Mapping trace of the BPM "Show container" i found error ""COMMUNICATION FAILURE" during JCo call. Error opening an RFC connection" and it seems that when BPM is attempting to call interface mapping it is throwing this error.
Thanks in advance.
Regards
rajeev

hi,
I think no problen with the mapping part,
jco connection requird when xi try to stablish the connection with the adapter .
please look the link provided.
Setup and test SAP Java Connector outbound connection
please also check the following parameter at the exchange profile
com.sap.aii.rwb.server.centralmonitoring.r3.ashost
com.sap.aii.rwb.server.centralmonitoring.r3.client
com.sap.aii.rwb.server.centralmonitoring.r3.sysnr
com.sap.aii.rwb.server.centralmonitoring.httpport
these parameter must be given properly.
if every thing is ok than and problem still exist than try to restart the system.
for us after restarting its worked fine.
regards,
navneet

JCO communication error/ failure

In all scenarios, XML file has been picked up from the destination but not found in the target directory.
( In Adapter Framework the inbound and outbound messages are in green color.)
In qRFC monitor (TC smq2) the status is SYSFAIL.
When double clicking the SYSFAIL, a window shows that "communication failure during JCO all error"
Could you please let me know what is the error and how to solve this ?
Regards,
Ashok kumar

Ashok -
Did you check these links:
Mapping Error :JCO_COMMUNICATION_FAILURE
getting error "JCO_COMMUNICATION_FAILURE"
JCO_COMMUNICATION_FAILURE
JCO_COMMUNICATION_FAILURE
Hope those help.
Thanks,
Tirumal

JCO connection failure

Hi Friends,
I am getting the below error in integration engine
"communication failure during JCO call".
Pls help me how to resolve this issue.
Regards,
Suresh.

Hello
this is very generic error, more details must be known to solve the issue, if you are having this problem with your RFC communication channel, goto communicatin channel monitoring in RWB and there you would have complete details of why this error is occuring, do post back with those details to have clear understanding of the problem.
Moreover try creating an ABAP connection to R/3 system to which connection is being made and check if you are able to access the system altogether or not, for this follow the following step:
login to your PI server from SAP GUI with user PISUPER
got t-code SM59
Create destination with type: 3
provide ip address of your R/3 system in target host and instance number in respective field
save and execute "Connection test"
this will let you know if you are altogether able to access the R/3 system for PI server.

Mysql error java.sql.SQLException: Communication failure during handshake.

Hi !!!
I was working ok, with hibernate and mysql but yesterday I try to install the new mysql version (4.1.10) and receive the following error when I try to connect
Initializing Hibernate
INFO - Hibernate 2.1.6
INFO - hibernate.properties not found
INFO - using CGLIB reflection optimizer
INFO - configuring from resource: /hibernate.cfg.xml
INFO - Configuration resource: /hibernate.cfg.xml
INFO - Mapping resource: com/tutorial/hibernate/core/News.hbm.xml
INFO - Mapping class: com.tutorial.hibernate.core.News -> news
INFO - Configured SessionFactory: null
INFO - processing one-to-many association mappings
INFO - processing one-to-one association property references
INFO - processing foreign key constraints
INFO - Using dialect: net.sf.hibernate.dialect.MySQLDialect
INFO - Maximim outer join fetch depth: 2
INFO - Use outer join fetching: true
INFO - Using Hibernate built-in connection pool (not for production use!)
INFO - Hibernate connection pool size: 20
INFO - using driver: org.gjt.mm.mysql.Driver at URL: jdbc:mysql://localhost/unnobanews
INFO - connection properties: {user=news, password=news}
INFO - Transaction strategy: net.sf.hibernate.transaction.JDBCTransactionFactory
INFO - No TransactionManagerLookup configured (in JTA environment, use of process level read-write cache is not recommended)
WARN - Could not obtain connection metadata
java.sql.SQLException: Communication failure during handshake. Is there a server running on localhost:3306?
at org.gjt.mm.mysql.MysqlIO.init(Unknown Source)
at org.gjt.mm.mysql.Connection.connectionInit(Unknown Source)
at org.gjt.mm.mysql.jdbc2.Connection.connectionInit(Unknown Source)
at org.gjt.mm.mysql.Driver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:140)
Somewhere I red that was necessary to update the jdbc driver, so I updated it from version nro 2 to version nro 3.1.7 but still the error
Phpmyadmin works ok and mysql control center can connect ok too.
But when I try a telnet localhost:3306 I receive and error of connection filed
Anyway the mysql status thowme correct information, that it working ok!
Any idea ?
King regards
Naty

Hibernate 2.1.6
loaded properties from resource hibernate.properties: {hibernate.connection.username=root, hibernate.connection.password="", hibernate.cglib.use_reflection_optimizer=true, hibernate.connection.pool_size=10, hibernate.dialect=net.sf.hibernate.dialect.MySQLDialect, hibernate.connection.url=jdbc:mysql://manoj/manoj, hibernate.connection.driver_class=org.gjt.mm.mysql.Driver}
using CGLIB reflection optimizer
configuring from resource: /hibernate.cfg.xml
Configuration resource: /hibernate.cfg.xml
Mapping resource: com/mec/emp.hbm.xml
Mapping class: com.mec.Employee -> emp
Configured SessionFactory: null
processing one-to-many association mappings
processing one-to-one association property references
processing foreign key constraints
Using dialect: net.sf.hibernate.dialect.MySQLDialect
Maximim outer join fetch depth: 2
Use outer join fetching: true
Using Hibernate built-in connection pool (not for production use!)
Hibernate connection pool size: 10
using driver: org.gjt.mm.mysql.Driver at URL: jdbc:mysql://manoj/manoj
connection properties: {user=root, password=""}
No TransactionManagerLookup configured (in JTA environment, use of process level read-write cache is not recommended)
Could not obtain connection metadata
java.sql.SQLException: Server configuration denies access to data source
     at org.gjt.mm.mysql.MysqlIO.init(MysqlIO.java:144)
     at org.gjt.mm.mysql.Connection.<init>(Connection.java:230)
     at org.gjt.mm.mysql.Driver.connect(Driver.java:126)
     at java.sql.DriverManager.getConnection(DriverManager.java:525)
     at java.sql.DriverManager.getConnection(DriverManager.java:140)
     at net.sf.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:101)
     at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:73)
     at net.sf.hibernate.cfg.Configuration.buildSettings(Configuration.java:1155)
     at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:789)
     at com.mec.CreateSession.getCurrentSession(CreateSession.java:35)
     at com.mec.TestEmployee.createEmployee(TestEmployee.java:37)
     at com.mec.TestEmployee.main(TestEmployee.java:24)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)
Use scrollable result sets: false
Use JDBC3 getGeneratedKeys(): false
Optimize cache for minimal puts: false
Query language substitutions: {}
cache provider: net.sf.hibernate.cache.EhCacheProvider
instantiating and configuring caches
building session factory
Not binding factory to JNDI, no JNDI name configured
SQL Error: 0, SQLState: 08001
Server configuration denies access to data source
Cannot open connection
java.sql.SQLException: Server configuration denies access to data source
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     at org.gjt.mm.mysql.Driver.connect(Driver.java:126)
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     at java.sql.DriverManager.getConnection(DriverManager.java:140)
     at net.sf.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:101)
     at net.sf.hibernate.impl.BatcherImpl.openConnection(BatcherImpl.java:286)
     at net.sf.hibernate.impl.SessionImpl.connect(SessionImpl.java:3326)
     at net.sf.hibernate.impl.SessionImpl.connection(SessionImpl.java:3286)
     at net.sf.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:40)
     at net.sf.hibernate.transaction.JDBCTransactionFactory.beginTransaction(JDBCTransactionFactory.java:19)
     at net.sf.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:2231)
     at com.mec.TestEmployee.createEmployee(TestEmployee.java:38)
     at com.mec.TestEmployee.main(TestEmployee.java:24)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)
Process finished with exit code 0

RFC call ended with "Communication Failure" exception (Function call failed; could not find the function

Hi All,
I am getting error while executing oDATA service from SAP Netweaver Gateway
Error details:
RFC call ended with "Communication Failure" exception (Function call failed; could not find the function
I am using SAP NG 740
Project is created in Gateway system using SEGW having Map to Datasource option used.
in SPRO manage alias, I had seleted Local App option. Screen attached
I had tried all troubleshooting like delete and add service and alias in "/IWFND_MAINT_SERVICE".
but still getting same error for all service.
Kindly advise.
Regards
Vivek

Hello Vivek,
Service builder would have also generated code for RFC Exception handling to catch exceptions raised when communication fails between your GW and BE for some reasons.
Handling is done for 1. System Failure 2. Communication Failure & 3. Business Failure;
Put a BP in your DPC or DP_EXT class where exception code is written to check what exactly is has caused communication failure.
Check if that RFC is existing in that destination or not.
For your reference : Code would be something like this. Put BP here and check the problem.
* Error and exception handling
IF lv_subrc <> 0.
* Execute the RFC exception handling process
   me->/iwbep/if_sb_dpc_comm_services~rfc_exception_handling(
     EXPORTING
       iv_subrc            = lv_subrc
       iv_exp_message_text = lv_exc_msg ).
ENDIF.
Go inside this method and check to get info on what has to be done to resolve issue.
Check carefully what has gone wrong and fix it accordingly.
No need of adding service & deleting as problem is not because of that.
Regards,
Ashwin

Communication failure : RFC Destination SALV_WD_EXPORT_PDF does not exist

Hi Experts,
I have one standard ALV report in ABAP Webdynpro.
When i try to print the ALV Report it gives Communication failure : RFC Destination SALV_WD_EXPORT_PDF does not exist.
Can you give solution for this one.
Regards,
Sri

Hi Sri
Please go through this..
/people/bv.pillai/blog/2007/01/09/webdynpro-abap-alv-print-versionpdf
also Have a look this note SAP NOTE 918236; you will need help from basis.
Cheers,
Kris.

HT1338 when I try to print, I get this error message "Communications Failure: The computer is no longer able to communicate with your printer. " followed by intruictions to turn off the printer and check connections etc. I am using an HP Officejet 6500 70

when I try to print, I get this error message "Communications Failure: The computer is no longer able to communicate with your printer. " followed by intruictions to turn off the printer and check connections etc. I am using an HP Officejet 6500 709e, connecter wirelessly

I'm using a mac (OS X - snow leopord) and am printing over the network (wirelessly).
HP Photosmart Premium Fax All in One - C410a
I was only able to print one page and then both my printer and my computer would display an error message about the printer's inability to print. Since then I've been able to resolve my specific problem.
I
1. uninstalled HP from my computer (checked to ensure that my printer was no longer visible in my printers and the HP Utility software was nowhere to be found),
2. grabbed the software/driver update from Aug, 2010,
3. installed the Aug, 2010 update, and my problems seem to have been fixed.
This is where I got my 2010 update from (obviously you should get the driver/software applicable to your OS and specific printer):
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=mp-85379-1&cc=us&dlc=en&lc=en&...

Fatal: Communication Failure: The computer is no longer able to communicate

I was printing some documents and was doing great, all of a sudden the printer stopped and started showing this message;
+"fatal: Communication Failure: The computer is no longer able to communicate with your printer. Turn the printer off, check your printer connections and check for printer errors, and turn the printer back on."+
(the printer is a HP Photosmart 7760).
I've done everything I could think of to fix the problem but nothing (deleted the printer, re-added it, downloaded the new driver from the website, turned off and back on, re-started the computer) but then, I really really screwed things up when I went and deleted the "PrintJobMgr/Contents/MacOS/PrintJobMgr"
Wow! How smart. Now I'm trying to restore that file. I've looked in the internet to see if it is available, I got it from a friend but it doesn't work..
Please, can somebody tell me what can I do at this point.
Oh, I forgot to mention that the printer is connected to my Airport Extreme Router.
Help!
Message was edited by: sakko
Message was edited by: sakko

It sounds like you need to do a reinstall to get the PrintJobMgr back. I don't think you can use Pacifist (versiontracker.com) to install this separately, but it might be worth a try.
Reinstalling the PrintJobMgr should get you back to where you started. At this point, I would disconnect all the cables, turn off the printer, let it sit for a bit, then reconnect and power up the printer.
Hope this helps.

Communication Failure: The computer is no longer able to communicate with your printer.

Hello, I have a HP Officejet J6480 All-in-One printer. When I try to print, I receive this error message:
"Communication Failure: The computer is no longer able to communicate with your printer. Turn the printer off, check your printer connections and check for printer errors, and turn the printer back on."
I am using a Mac PowerBook G4, OS v10.5.7. I have tried the following:
-- rebooted my Mac
-- turned printer off/on
-- rebooted wireless router
-- tried to print using USB cable.
I continue to receive the same error message. Helllllllllllllllp!!!!
A couple of other things I need to mention: I bought this printer in June and have been able to print just fine since purchasing
this printer. As recently as Friday, July 3, I was able to print and printed 6 or 7 pages then. This is CRAZY!!!!
Thanks.
Barb
Message Edited by BarbNPhx on 07-05-2009 10:55 AM

I'm using a mac (OS X - snow leopord) and am printing over the network (wirelessly).
HP Photosmart Premium Fax All in One - C410a
I was only able to print one page and then both my printer and my computer would display an error message about the printer's inability to print. Since then I've been able to resolve my specific problem.
I
1. uninstalled HP from my computer (checked to ensure that my printer was no longer visible in my printers and the HP Utility software was nowhere to be found),
2. grabbed the software/driver update from Aug, 2010,
3. installed the Aug, 2010 update, and my problems seem to have been fixed.
This is where I got my 2010 update from (obviously you should get the driver/software applicable to your OS and specific printer):
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=mp-85379-1&cc=us&dlc=en&lc=en&...

HP LaserJet M1212nf MFP Printer - Communication Failure with the scanner

Dear all,
May I kindly ask if there are any known resolutions in terms of a scanning issue with the HP LaserJet M1212nf MFP Printer?
When it starts scanning the printer only scans the up to the 3rd or 4th page, it stops in the middle of the sheet and produces an error message stating the following: Communication Failure with the scanner.
Are there any steps that may be followed in order to resolve the incident?
Many thanks in advance.
Best regards,
Ryan

Hi @Ryan_HP ,
I see that you are experiencing a communication error during scanning of multiple pages. I would like to help, but I will need some more information to provide you with the correct steps to resolve this issue.
If you are using Windows, download and run the Print and Scan Doctor. It will diagnose the issue and might automatically resolve it. Find and fix common printer problems using HP diagnostic tools for Windows?
Temporarily turn off any Antivirus Software, just to rule out any interference.
Try scanning again.
What operating system are you using?
How to Find the Windows Edition and Version on Your Computer.
Mac OS X: How Do I Find Which Mac OS X Version Is on My Computer?
How is the printer connected? (USB/Ethernet)
What were the results when you ran the Print and Scan Doctor? (did it print or scan, any error messages)
What scanning software are you using?
Have a wonderful day!
Thank You.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Gemini02
I work on behalf of HP

MAC OSX 10.5.8 HP C7280 not printing - communication failure

I have a Mac OSX 10.5.8 , It has been wirelessly connected to mt HPC7280 for a long time and prints perfectly up until today. The queue shows "printing" for a while but nothing prints and then I get this messege:
"Communication Failure: The computer is no longer able to communicate with your printer. Turn the printer off, check your printer connections and check for printer errors, and turn the printer back on."
Tried all troubleshooting on this page: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02205477&cc=us&dlc=en&lang=en&lc=en&product=320...
Nothing seems to work. Any help would be greatly appreciated. Thanks.

Let's reset the printing system:
- Go to System Preferences > Print & Scan
- Right (or control) click in the rectangle listing your printers and select Reset Printing System.
WARNING - this will delete ALL of your printers!
- Select the plus sign to re-add a printer. Select the Defualt tab on the top of the window. Look for the printer, select it and wait until the "Add" button becomes available. Click it.
Say thanks by clicking "Kudos" "thumbs up" in the post that helped you.
I am employed by HP

Mapping: JCO Communication Failure

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