Need basic primer on distributed transactions and java

Hello,
          I am new to distributed transactions in Java...
          I am wondering if there is useful link that will
          explain the basics....
          How is it supported in J2EE, etc.?
          How is it supported in WLS?
          How does 2-phase commit work, etc.?
          Thanks,
          Jason

Hi,
          I fond the following a good clear, concise (non vendor specific) intro to
          transactions.
          http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Transaction.html
          Cheers,
          SB
          "Jason Rosenberg" <[email protected]> wrote in message
          news:3eba8128$[email protected]..
          > Hello,
          >
          > I am new to distributed transactions in Java...
          >
          > I am wondering if there is useful link that will
          > explain the basics....
          >
          > How is it supported in J2EE, etc.?
          > How is it supported in WLS?
          > How does 2-phase commit work, etc.?
          >
          > Thanks,
          >
          > Jason
          >
          >

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Distributed transactions and 2-phase commit in a SAP Netweaver environment

Hello,
I am a Java architect., I don't know very much the SAP technologies. I tried to found on forums or technical papers if SAP does support distributed transactions and two-phase commit, it's not clear. I found something on SAP WAS but my project is using a SAP PI 7.0 and I cannot find anything on the subject.
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Hi,
Do you know this white paper ?
[Distributed Transaction and 2 phase commit|https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/3732d690-0201-0010-a993-b92aab79701f]
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What is the difference between action and workflow? How do I decide that I need an action in a transaction and not a workflow and vice versa?

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I have few doubts and request your expert inputs to clarify my doubts.
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Hi SMTP,
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Distributed Transactions and Linked Servers

I'm somewhat of a novice with SQL Server but I'm learning rapidly from an application I'm developing that uses SQL Server very heavily. In conjunction with the development of this application, I have 3-4 systems set up running SQL Server and I am using those
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I was doing a simple delete query on one of the servers (Delete from TableName Where ...) and I was expecting, of course, that it would only impact the server I was running it on; however, when the query finished after running for a long time, it was apparent
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I want to ensure that this doesn't happen again without me expecting it - I think the right way to prevent this from happening is to run the following stored procedure:
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Hello,
Based on your description, it seems that when you connect to a SQL Server database and execute a DELETE statement to delete a recode on a table, and then the same recode were delete in the linked server which has the same table.
As pre my understand, the statement executed on one server will not apply to the linked servers unless you specify the logic yourself in the application. For example, you use dynamic query and exec the query synchronously on linked servers.
What's more, did you specify replication between this linked server?
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Weblogic 5.1, Distributed Transaction and Oracle Database Link

We are planning to add a new functionality to run in Weblogic server and it
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Weblogic 5.1 and it is unrealistic to upgrade to 6.1 in short term, we have
to deal with the fact that distributed transaction is not supported by JTS
on 5.1.
One workaround we can think of is to utilize Oracle database link. Instead
of having two connection pools, the application talks to only one database
and access the tables on the other ones through Oracle database link.
Therefore, when a session bean tries to update two tables on database 1 in
one transaction, one of the tables is just a link to the other database. We
hope that even though distributed transaction is not supported by JTS in
Weblogic 5.1, but since it is supported by Orable, it would work.
Do you think the above workaround would work? Does anyone have experience on
something like that?
Thanks in advance,
David Chen
[email protected]

Hi. You should be able to use any JDBC driver with WebLogic 5.1.
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Distributed transactions and connection pooling

Hi,
We have a problem with the enlistment of connections in distributed transactions.
The following very simple C# program does not work correctly (a simple form with one button and a class hosted in COM+). If you put a breakpoint on "cnOraTx.Close();" you will see that the inserted record is already visible in the database although the transaction has not commited yet.
If you comment out the lines between //START and //END everything works as expected.
Also, if we use "Pooling=false" in the connection string, everything works fine again, but since we are writing a web application, we really need the connection pooling.
We are using ODP.NET 9.2.0.2.102 (I also tried with the ODP.NET 9.2.0.4.0 BETA) and an oracle 8.1.7 database.
Best Regards,
Piet
private void button1_Click(object sender, System.EventArgs e)
//When commenting the following lines the connection is enlisted in the distributed transaction
//START
OracleConnection cnOraTx;
cnOraTx = new Oracle.DataAccess.Client.OracleConnection("Data Source=ECOMP532;User ID=USER;Password=PWD");
cnOraTx.Open();
cnOraTx.Close();
cnOraTx.Dispose();
//END
OpenOraTransConn obj = new OpenOraTransConn();
obj.Connect();
//This class is going to be hosted within COM+
[Transaction(TransactionOption.Required)]
public class OpenOraTransConn: ServicedComponent
private OracleConnection cnOraTx;
private OracleCommand cmd;
internal void Connect()
cnOraTx = new OracleConnection("Data Source=ECOMP532;User ID=USER;Password=PWD");
cnOraTx.Open();
cmd = new OracleCommand();
cmd.Connection = cnOraTx;
cmd.CommandText = "INSERT INTO SYSADM.PERSON (PE_KEY) VALUES(130000)";
cmd.ExecuteNonQuery();
cnOraTx.Close();
cnOraTx.Dispose();
ContextUtil.SetComplete();

Hello:
We are experiencing the exact same problem. INSERT, UPDATE or DELETE statements that should roll back because an exception is being thrown from inside our ServicedComponent-derived class (which is set to TransactionOption.Required and uses AutoComplete) are not -- and instead are being committed to the database.
Were you able to figure out why this is happening, and what can be done to get around it? We too were able to avoid the problem by setting Pooling=False to our connect string, but for a variety of reasons we want to use connection pooling ...!

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Concerning my AT&T Data plan:
1- when i'm using the device by itself, all indicators show that auto-switching is working when wifi is available. ok, bb gurus, i can't afford any surprises on my bill, so...is it really working all by itself, or am i gonna have to play the "disable this, enable that" game to make sure?
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EDIT: i just noticed that when i have wifi, the ssid shows up next to the "AT&T" on the main screen, i walked back & forth across the street and watched it change...holy-moly i'm digging this phone!

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2- you saying i get the updated OS?
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http://mb-rambler.mysite.com/
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MDB Distributed transaction and stored procedure rollback

Hi All,
I am developing an asynchronous application using MDB. My application flow is as follows:
1. From MDB onMessage i am calling another method MEthodA that
a. calls a simple pojo1 where I am getting a Connection on XA enable datasource1 and executing Stored Procedure1 of DatabaseSchema1. In Stored Procedure1 I have some inner savpoints and rollback. No commit is inside Stored Procedure1 .
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c. Again from MethodA m calling an different pojo2 where I am getting a new Connection on XA enable datasource2 and executing Stored Procedure2 of DatabaseSchema1.In this pojo also without commiting m closing the connection and coming back in MethodA. In Stored Procedure2 I have some inner savpoints and rollback. No commit is inside Stored Procedure2 .
d. Again from MethodA m calling pojo1 where I am getting a new Connection on XA enable datasource1 and executing a diffrent function of Stored Procedure1 of DatabaseSchema1.
Now problem is:
I have written some Savepoint and rollback inside Stored Procedure1 and inside Stored Procedure2. But these rollback is working only in inside Stored Procedure1 not in inside Stored Procedure2 in each case.
In ejb-jar.xml transaction attributes is Required for all methods and transaction type is Container.
Backend is Oracle 10g and init.xa has already been run on that.
I have tested this on Oc4J and Websphere 6.0.
I am using XaDatasource.
Will be very obliged if any one can give a single hint of the problem as soon as possible.
Thanks a lot

Hi Kent;
You have a few choices (AFAIK) with ASE...
1) AutoCommit = TRUE
- must be before connect to your DB
2) End your PB transaction first. For example
String ls_end = "END TRANSACTION"
String ls_begin = "BEGIN TRANSACTION"
EXECUTE IMMEDIATE ls_end using SQLCA;
<call your SP>
EXECUTE IMMEDIATE ls_begin using SQLCA;
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- or -
4) In your SP ...
Commit Transaction
begin transaction
insert into mytab (pub_id) values ("9999")
commit transaction

Need basic Help - SG300 with vlan and routing

Hi,
i need some basic help with configuring vlan/routing.
Situation:
DSL Router - Cisco 300 - XenServer
192.168.1.253 - 192.168.1.19 - 192.168.1.10 (mgmt ip)
goal is, to reach from inside xenserver vms the internet.
vms = 192.168.2.x
gateway ip = 192.168.2.1
what i did:
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So at the moment i cant ping from inside a vm to the DSL Router (192.168.2.2 to 192.168.1.253)
any ideas what i misconfigured or whats wrong?
cheers,
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Hi Tom,
ok, that make sense. I can ping the router now inside vms from 192.168.2.x network.
But i cant ping external adresses, error: Destination net unreachable.
My other problem i have, i cant reach any server from outside over router portforwarding.
How do i have to configure the upload port to the dsl router? Is it a access port or a trunk
port with all vlans (tagged or untagged?) At the moment ive a tagged Trunkport with all vlans.
IPv4 Interface Table
Interface
IP Address Type
IP Address
Mask
Status
VLAN 1
Static
192.168.1.19
255.255.255.0
Valid
Should the VLAN1 ip adress not the router ip adress ? Do i need an additional vlan for
the router ? At the end i like to change the switch ip from dhcp to static (change automaticly
when switching to layer 3 mode), but ive to look for the ios commands first.
What else do i missing ?
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Marcus

JMS Distributed Transactions

I need to perform a distributed transaction in My Servlet.
My distributed transaction involves Updating to the DB and also publishing a message to a queue.
The queue is not present in my app server, where my Servlet is running.
It is there on a remote machine.
I'm using below code to achieve the same.
But I'm not getting the transactional behaviour working... That means
If I publish a message to queue and then if DB Operation fails, the transaction should roll back and the queue should not be having any contents.
But my queue is still showing me the contents...
Any glitches in my code???
public class RemoteServlet extends javax.servlet.http.HttpServlet implements
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A "resource adapter" is a JavaEE component used by modern application servers for linking to an external resource such as a JMS provider or database. It will wrap the XAQueueConnection for you and take care of enlisting the resources, performing two-phase commit, etc. - basically hiding all the complexities of XA transactions from you.
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Distributed Transaction in weblogic 5.1

Hi all,
Does Weblogic 5.1 support Distributed Transactions?.

While they aren't java-specific, if you're looking for XA/2PC details,
these 2 are good:
Transaction Processing: Concepts and Techniques (Morgan Kaufmann Series
in Data Management Systems)
by Jim Gray, Andreas Reuter
Principles of Transaction Processing
by Philip A. Bernstein, Eric Newcomer (Contributor)
5.1 does not support XA or 2 phase-commit. However, it does allow
multiple cluster members to enlist in the same transaction as long as
all database access goes through the same JDBC connection.
WLS 6.0 and later do support XA and 2PC.
-- Rob
chandrasekar wrote:
Hi all,
Does Weblogic 5.1 support Distributed Transactions?.Please suggest me some
books or documentation regarding Distributed Transactions, and about the XA compliant
resources.

ADS in ABAP and JAVA on different servers

Dear community,
I need to run ADS with ABAP and JAVA on different servers but after read and apply every step on The ADS Configuration Guide, still getting doubts and problems. Those steps work succesfully on a server with ABAP+JAVA on same server. Those are the problems:
When I perform the report test FP_TEST_00 i get this error:
ADS: com.adobe.ProcessingException: Problem accessing d(200101)
I haven't found a a detailed procedure to set on ABAP and JAVA on different servers...
Do you know any procedure to set this scenario??
As a result, I don't know which role i must assign to adsuser on Java UME because i did not found any SAP_ADSCALLER role as i have ridden on some forums or blogs...
I try to set ADS on ABAP+JAVA on different servers by this official guides:
The ADS Configuration Guide:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/30a9630b-4f89-2a10-6fab-e311b3ffd9a6
The ADSConfiguration Guide for Print Scenarios
http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/a04ef746-4c89-2a10-0f8e-eb2b3460fb7c
Thanks in advance
Kind regards
Scottie

HI again,
ADS_AGENT now has sap_all but still same problem:
Creating or Changing the Destination Service, On Visual Administrator/Destinations/HTTP/ FP_ICF_DATA_<SID>
When I set the URL http://<hostname>:<HTTP_port> i am getting error Received HTTP response 502
- If I paste the http://<hostname>:<HTTP_port> +
- Enter the appropriate client number of the system, where the service user ADS_AGENT exists into the client field. Keep the other fields System ID and Language empty +
- Under Logon Data, choose BASIC in the Authentication field. +
- Enter ADS_AGENT in the Username field and enter the same password as given for this service user in the SAP NetWeaver AS ABAP in the Password field
- Choose Save and Test and Received HTTP response 502 appears.
But if I paste on Explorer http://<hostname>:<HTTP_port>/sap/bc/fp/form/layout/fp_test_00.xdp, request User (ADS_AGENT) +Pwd and work ok, so error only appears by Visual Administrator...
Anybody knows how can resolve this doubt?
Thanks in advance

Errors in DB alert log for distributed transactions

Hi,
I am receiving the following type of errors regularly in one of our development databases:
Errors in file e:\oracle\product\diag\rdbms\agdev10g\agdev10g\trace\agdev10g_reco_16356.trc:
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
ORA-02062: distributed recovery received DBID d672931d, expected 2d7b9dec
ORA-12154: TNS:could not resolve the connect identifier specified
ORA-12500: TNS:listener failed to start a dedicated server process
ORA-12154: TNS:could not resolve the connect identifier specified
From researching on the net it looks like it may have something to do with distributed transactions and database links however I'm not sure how to proceed to diagnose the problem and find out where the issue is. Can anyone help?
Thanks
Adam
Edited by: Adam J. Sawyer on 27/05/2010 16:57

SQL*Net typically involves two systems so post following details for both systems
Post Operating System (OS) name & version for DB server system.
Post results of
SELECT * from v$version
or post Oracle version to 4 decimal places
oerr ora 12514
12514, 00000, "TNS:listener does not currently know of service requested in connect descriptor"
// *Cause: The listener received a request to establish a connection to a
// database or other service. The connect descriptor received by the listener
// specified a service name for a service (usually a database service)
// that either has not yet dynamically registered with the listener or has
// not been statically configured for the listener. This may be a temporary
// condition such as after the listener has started, but before the database
// instance has registered with the listener.
// *Action:
// - Wait a moment and try to connect a second time.
// - Check which services are currently known by the listener by executing:
//    lsnrctl services <listener name>
// - Check that the SERVICE_NAME parameter in the connect descriptor of the
//    net service name used specifies a service known by the listener.
// - If an easy connect naming connect identifier was used, check that
//    the service name specified is a service known by the listener.
// - Check for an event in the listener.log file.
bcm@bcm-laptop:~$ oerr ora 2062
02062, 00000, "distributed recovery received DBID %s, expected %s"
// *Cause: a database link at a coordinator no longer points to the expected
//         database. Link may have been redefined, or a different DB mounted.
// *Action: restore link definition or remote database.
bcm@bcm-laptop:~$ oerr ora 12154
12154, 00000, "TNS:could not resolve the connect identifier specified"
// *Cause: A connection to a database or other service was requested using
// a connect identifier, and the connect identifier specified could not
// be resolved into a connect descriptor using one of the naming methods
// configured. For example, if the type of connect identifier used was a
// net service name then the net service name could not be found in a
// naming method repository, or the repository could not be
// located or reached.
// *Action:
//   - If you are using local naming (TNSNAMES.ORA file):
//      - Make sure that "TNSNAMES" is listed as one of the values of the
//        NAMES.DIRECTORY_PATH parameter in the Oracle Net profile
//        (SQLNET.ORA)
//      - Verify that a TNSNAMES.ORA file exists and is in the proper
//        directory and is accessible.
//      - Check that the net service name used as the connect identifier
//        exists in the TNSNAMES.ORA file.
//      - Make sure there are no syntax errors anywhere in the TNSNAMES.ORA
//        file. Look for unmatched parentheses or stray characters. Errors
//        in a TNSNAMES.ORA file may make it unusable.
//   - If you are using directory naming:
//      - Verify that "LDAP" is listed as one of the values of the
//        NAMES.DIRETORY_PATH parameter in the Oracle Net profile
//        (SQLNET.ORA).
//      - Verify that the LDAP directory server is up and that it is
//        accessible.
//      - Verify that the net service name or database name used as the
//        connect identifier is configured in the directory.
//      - Verify that the default context being used is correct by
//        specifying a fully qualified net service name or a full LDAP DN
//        as the connect identifier
//   - If you are using easy connect naming:
//      - Verify that "EZCONNECT" is listed as one of the values of the
//        NAMES.DIRETORY_PATH parameter in the Oracle Net profile
//        (SQLNET.ORA).
//      - Make sure the host, port and service name specified
//        are correct.
//      - Try enclosing the connect identifier in quote marks.
//   See the Oracle Net Services Administrators Guide or the Oracle
//   operating system specific guide for more information on naming.
bcm@bcm-laptop:~$ oerr ora 12500
12500, 00000, "TNS:listener failed to start a dedicated server process"
// *Cause: The process of starting up a dedicated server process failed.
// The executable could not be found or the environment may be set up
// incorrectly.
// *Action: Turn on tracing at the ADMIN level and reexecute the operation.
// Verify that the ORACLE Server executable is present and has execute
// permissions enabled. Ensure that the ORACLE environment is specified
// correctly in LISTENER.ORA. The Oracle Protocol Adapter that is being
// called may not be installed on the local hard drive. Please check that
// the correct Protocol Adapter are successfully linked.
// If error persists, contact Oracle Customer Support.What explicit SQL or command trigger these errors?

Need basic primer on distributed transactions and java

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