Issue in RMI connection from NW

Hi All,
We are working on SAP NW 7.0 connectivity to an external J2EE application running on Websphere platform using RMI protocol. We are facing issues in connecting a Java application running on NW 7.0 to that external application.
The EJB of the external system is running on Web sphere and Java application on NW server is acting as ejb client. Web sphere is running on IBM JDK and NW is running on HP JDK.
The application and connection works fine for some time and after some time the integration stops working and all further new requests do not go through. We found that the initial context look up stops working after some time. The JNDI Look up is the line where it gets stuck. Once we restart NW service again, things start working and stops again after some time.
We are unable to identify the root cause of the issue.
Thanks in advance.
Shaila Krishna.

Hi,
Did you try increasing the number of connection at both ends?
In SAP NW you can increase the number of connections in the jco connector.
Regards,
Vamshi.

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Having recently load-tested the application we are developing I noticed that
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private Connection getConnection() throws SQLException {
try {
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myLog.error(this.makeSQLInsertable("getConnection - could not
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In other parts of the code, not developed by the same team, I've seen the
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return DriverManager.getConnection("jdbc:weblogic:jts:FTPool");
From the performance-measurements I made the latter seems to be much more
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The first version took a total of 75724ms for a total of 7224 calls which
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The second version took a total of 8127ms for 11662 calls which gives
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I'm no JDBC guru som i'm probably missing something vital here. One
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that makes the very same (DataSource)
jndiCntx.lookup("java:comp/env/jdbc/txDatasource") in order to fetch the
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since one call is part of the second. If not, then the second version sure
seems a lot faster.
Apart from the obvious performance-differences in the two above approaches,
is there any other difference one should be aware of (transaction-context
for instance) between the two ? Basically I'm working in an EJB-environment
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Linus Nikander wrote:
Thank you for both your replies. As per your suggestions I've improved my
connectionhandling (I ended up implementing the Service Locator pattern as a
matter of fact).
One thing still puzzles me though. Which (and why) is the "proper" way to
fetch the actual dataSource. As I stated before in the code I've seen two
approaches within the code I've got.
1. myDs = myServiceLocator.getDataSource("jdbc:weblogic:jts:FTPool");
2. myDs = myServiceLocator.getDataSource("java:comp/env/jdbc/tgsDB");
where getDataSource does a dataSource = (DataSource)
initialContext.lookup(dataSourceName); dataSourceName being the input-string
obviously.
tgsDB is defined as
<reference-descriptor>
<resource-description>
<res-ref-name>jdbc/tgsDB</res-ref-name>
<jndi-name>tgs-dataSource</jndi-name>
</resource-description>
</reference-descriptor>
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The service locator that
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hurt.
>
>
In my two examples above. If i use version 1. How will the server know
whether to give me a TX-bound connection and when not to ? In version 1
FTPool maps to a pool with both TX and non-TX datasources. In version 2.
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I might be asking a lot of strange questions, probably because I'm just
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associated with.Bear with me ;)
//Linus
"Joseph Weinstein" <[email protected]> wrote in message
news:[email protected]...
Hi. As Jon said, the lookups are redundant. Because you showed that otherway,
I will infer that this code is always being run in serverside code. Good.I will give you
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The second, faster method you showed also has a serious problem! Oneshould
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public myJDBCMethod()
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try {
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... do all the jdbc for the method...
c.close();
c = null;
catch (Exception e) {
... do whatever, if needed...
finally {
// close connection regardless of failure or exit path
if (c != null) try {c.close();}catch (Exception ignore){}
Joe
Linus Nikander wrote:
Having recently load-tested the application we are developing I noticed
that
one of the most expensive (time-wise) calls was my fetch of adb-connection
from the defined db-pool. At present I fetch my connections using :
private Connection getConnection() throws SQLException {
try {
Context jndiCntx = new InitialContext();
DataSource ds =
(DataSource)
jndiCntx.lookup("java:comp/env/jdbc/txDatasource");
return ds.getConnection();
} catch (NamingException ne) {
myLog.error(this.makeSQLInsertable("getConnection - couldnot
find connection"));
throw new EJBException(ne);
In other parts of the code, not developed by the same team, I've seenthe
same task accomplished by :
private Connection getConnection() throws SQLException {
return DriverManager.getConnection("jdbc:weblogic:jts:FTPool");
From the performance-measurements I made the latter seems to be muchmore
efficient (time-wise). To give you some metrics:
The first version took a total of 75724ms for a total of 7224 callswhich
gives ~ 11ms/call
The second version took a total of 8127ms for 11662 calls which gives
~0,7ms/call
I'm no JDBC guru som i'm probably missing something vital here. One
suspicion I have is that the second call first find the jdbc-pool andafter
that makes the very same (DataSource)
jndiCntx.lookup("java:comp/env/jdbc/txDatasource") in order to fetch the
actual connection anyway. If that is true then my comparison is plainwrong
since one call is part of the second. If not, then the second versionsure
seems a lot faster.
Apart from the obvious performance-differences in the two aboveapproaches,
is there any other difference one should be aware of(transaction-context
for instance) between the two ? Basically I'm working in anEJB-environment
on weblogic 7.0 and looking for the most efficient way to get hold of a
db-connection in code. Comments anyone ?
//Linus Nikander - [email protected]

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############### This section is just for location-hidden services ###
## Look in .../hidden_service/hostname for the address to tell people.
## HiddenServicePort x y:z says to redirect a port x request from the
## client to y:z.
#HiddenServiceDir /var/lib/tor/hidden_service/
#HiddenServicePort 80 127.0.0.1:80
#HiddenServiceDir /var/lib/tor/other_hidden_service/
#HiddenServicePort 80 127.0.0.1:80
#HiddenServicePort 22 127.0.0.1:22
#HiddenServiceNodes moria1,moria2
#HiddenServiceExcludeNodes bad,otherbad
################ This section is just for servers #####################
## NOTE: If you enable these, you should consider mailing your identity
## key fingerprint to the tor-ops, so we can add you to the list of
## servers that clients will trust. See
## http://tor.eff.org/doc/tor-doc.html#server for details.
## Required: A unique handle for this server
#Nickname ididnteditheconfig
## The IP or fqdn for this server. Leave commented out and Tor will guess.
#Address noname.example.com
## Contact info that will be published in the directory, so we can
## contact you if you need to upgrade or if something goes wrong.
## This is optional but recommended.
#ContactInfo Random Person <nobody AT example dot com>
## You might also include your PGP or GPG fingerprint if you have one:
#ContactInfo 1234D/FFFFFFFF Random Person <nobody AT example dot com>
## Required: what port to advertise for tor connections
#ORPort 9001
## If you want to listen on a port other than the one advertised
## in ORPort (e.g. to advertise 443 but bind to 9090), uncomment
## the line below. You'll need to do ipchains or other port forwarding
## yourself to make this work.
#ORBindAddress 0.0.0.0:9090
## Uncomment this to mirror the directory for others (please do)
#DirPort 9030 # what port to advertise for directory connections
## If you want to listen on a port other than the one advertised
## in DirPort (e.g. to advertise 80 but bind 9091), uncomment the line
## below. You'll need to do ipchains or other port forwarding yourself
## to make this work.
#DirBindAddress 0.0.0.0:9091
## A comma-separated list of exit policies. They're considered first
## to last, and the first match wins. If you want to *replace*
## the default exit policy, end this with either a reject *:* or an
## accept *:*. Otherwise, you're *augmenting* (prepending to) the
## default exit policy. Leave commented to just use the default, which is
## available in the man page or at http://tor.eff.org/documentation.html
## Look at http://tor.eff.org/faq-abuse.html#TypicalAbuses
## for issues you might encounter if you use the default exit policy.
## If certain IPs and ports are blocked externally, e.g. by your firewall,
## you should update your exit policy to reflect this -- otherwise Tor
## users will be told that those destinations are down.
#ExitPolicy accept *:6660-6667,reject *:* # allow irc ports but no more
#ExitPolicy accept *:119 # accept nntp as well as default exit policy
#ExitPolicy reject *:* # middleman only -- no exits allowed
ReachableDirAddresses *:80
ReachableORAddresses *:443
But Tor is unable to connect. Here is the log
Tor[5442]: No current certificate known for authority moria1; launching request.
Tor[5442]: No current certificate known for authority tor26; launching request.
Tor[5442]: No current certificate known for authority dizum; launching request.
Tor[5442]: No current certificate known for authority ides; launching request.
Tor[5442]: No current certificate known for authority gabelmoo; launching request.
Tor[5442]: No current certificate known for authority dannenberg; launching request.
Tor[5442]: Your application (using socks4 to port 80) is giving Tor only an IP address. Applications t
hat do DNS resolves themselves may leak information. Consider using Socks4A (e.g. via privoxy or socat) instead. For more inf
ormation, please see http://wiki.noreply.org/noreply/TheOnionRouter/TorFAQ#SOCKSAndDNS.
Tor[5442]: Application request when we're believed to be offline. Optimistically trying directory fetc
hes again.
I can't find any documentation about this issue.
Thanks.

## Tor only trusts directories signed with one of these keys, and
## uses the given addresses to connect to the trusted directory
## servers. If no DirServer lines are specified, Tor uses the built-in
## defaults (moria1, moria2, tor26), so you can leave this alone unless
## you need to change it.
#DirServer 18.244.0.188:9031 FFCB 46DB 1339 DA84 674C 70D7 CB58 6434 C437 0441
#DirServer 18.244.0.114:80 719B E45D E224 B607 C537 07D0 E214 3E2D 423E 74CF
#DirServer 86.59.21.38:80 847B 1F85 0344 D787 6491 A548 92F9 0493 4E4E B85D
Try uncomment this...
Maybe tor need this address
Sorry for my very bad english, i am from Brazil, add me in GTalk if you need more support.
[email protected]
Good luck!

Dbcon connection from sap db2 to external sql server

Hi ,
I am trying to connect from my sap server which is in unix platform with DB2 database to external SQL server using DBCON as MSSQL_SERVER=<server_name> MSSQL_DBNAME=<db_name>. But while running ADBC_TEST_connection i am getting the error . When i check the error log it says
Loading DB library '/usr/sap/DVL/SYS/exe/run/dbmssslib.so' ...
M *** ERROR => DlLoadLib()==DLENOACCESS - dlopen("/usr/sap/SID/SYS/exe/run/dbmssslib.so") FAILED
"Unable to find library '/usr/sap/DVL/SYS/exe/run/dbmssslib.so'." [dlux.c 445]
M {root-id=002655A9DCD21EE3B89D69F99DF39F0D}_{conn-id=00000000000000000000000000000000}_0
B *** ERROR => Couldn't load library '/usr/sap/SID/SYS/exe/run/dbmssslib.so'
How to resolve this issue. As it was mentioned in few forum we need to download the dbsl library from kernel patches and to load in kernel path. As my db is DB2 can we download dbmssslib.so this library and load in kernel file? Is it will work?
Regards,
Rai

Hi Rai,
This error indicates that the ABAP stack could not find the SAP DBSL for SQL Server (dbmssslib.dll) in the kernel directory. If you encounter this error on a Unix - based server the root cause is clear: the DBSL does not exist for other platforms than Windows or Linux x84_64. In this case use a Windows-based or a Linux x86_64-based SAP Application Server to establish the connection. If your system does not contain a Windows-based or a Linux x86_64-based Application Server you need to setup a small one as workaround. If you encounter this error on a Windows Application Server or a Linux x86_64 based Application Server make sure that the DBSL is properly installed in the kernel directory as explained in the document below.
For more details on configuration and troubleshooting refer to below SCN document
How to access an external Microsoft SQL Server database
Hope this helps.
Regards,
Deepak Kori

Remote Connection from SAP to MS-SQL server

Hello Experts,
We have been following 2 options so far and we have come across some issues
The first Option is to call a stored procedure (this is our preferred method) which does the data transfer for us
We have been able to test this scenario successfully from SQL Server side
However, while calling the stored proc via native SQL from ABAP we have come across an issue which is due to SQL 2005 changes (Schema implementation and difference in the security context)
While calling the stored procedure from the ABAP Code we have an error
The program short dumps with runtime error DBIF_DSQL2_SQL_ERROR, exception CX_SY_NATIVE_SQL_ERROR. The database error code is 15274, and the error text is
"Access to the remote server is denied because the current security context is not trusted."
This issue is new after the SQL Server 2005.
We are trying to resolve that.
Secondly we have been trying the DBCON option as well as per OSS Note 323151
We have a few things thatu2019s impacting our scenario:
The remote servers are in a different domain
The remote servers are located in DIZ
Remote server is a named instance
Remote server has been configured with a different port than standard (1565) u2013 All Connection strings will need port in there
The Database name starts with a numeric value
Due a combination of factors as mentioned above the standard approach does not work
Have any of you used this approach while connecting from SAP to MS-SQL server? Do you know of any successful methods to connect to SQL using ABAP (or not) from SAP.
Thanks in advance,

Yes,
DBConnect & UDConnect.
Works like a charm.
We write data into a MS-SQL database via DBConnect & an ABAP program (using open sql).

RFC connection from SAP Data services to SAP ECC

We have data services set up in linux machine. I am trying to set up RFC connection between data services and SAP ECC.
From data management console after creating RFC connection i am getting "RFC_bad_connection" error message. Username , password, system number, hostname and client is working from SAP GUI and has all the authorizations. SAP gateway and service is name is correct.
Did anyone had similar issue and what was the solution. Do we have start the RFC connection from linux data services machine, i didn't see any sh executable to do so.
Thanks in advance for helping to solve the RFC connection issue.
Edited by: gupta sasha az on Dec 19, 2011 7:24 PM

I am new to SAP and we have just started work on Data Services.
I wanted to know the complete procedure as in how can I establish a connection between Data Services and ECC.
Thanks for your help and time.

Issue in RMI connection from NW

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