Environment:
IBM Worklight 6.2,
IBM Liberty 8.5.5.1,
IBM DB2 10.5 &
Windows 2008 standard Edition.
For the High Availability of DB instance[WLDBINST], the following Architecture I have followed.
2 Windows Clustered Machines with IBM DB2 binary and SAN storage used to share the Database file in Common.
If any 1 node is not available the other node will take over the control without any loss of the data.
I have tested the DB2 instance via Cluster IP and it works fine.
The below error has been logged, when I run the Worklight Server Configuration tool,
Instance WLDBINST not found on server. Found only [WLDBINST C, :, DB2CLUSTER, DB2]
I have found the reason for the above issue. To list the DB2 Instances we can use the command db2ilist
C:\>db2ilist
WLDBINST C : DB2CLUSTER
DB2
Above result shows that we have two instances
WLDBINST which is in "C" drive and part of DB2CLUSTER &
DB2
Worklight Configuration tool also uses the similar DB2 tool to list the instances, I guess.
So the configuration tool considering the result as 4 instances as follows,
WLDBINST C,
:,
DB2CLUSTER and
DB2
How I can resolve this issue.
If the Server Configuration Tool is not able to create the database for your topology, you should create it manually before running the tool.
For the Administration database, the doc is here:
https://www-01.ibm.com/support/knowledgecenter/SSZH4A_6.2.0/com.ibm.worklight.installconfig.doc/admin/t_creating_the_db2_database_for_wladmin.html
For the Project Runtime databases, the doc is here:
https://www-01.ibm.com/support/knowledgecenter/SSZH4A_6.2.0/com.ibm.worklight.deploy.doc/admin/t_creating_the_db2_databases.html
The server configuration tool will not do any specific configuration to ensure that Liberty reopens a connection if there is a database node switch. I recommend that you review the behavior of Liberty in this case, and add settings in the server.xml as required.
Related
I have an AWS RDS (PostgreSQL) that is inside a private network - only accessible via a VPN and Bastian Host.
I am able to establish connection from PBI Desktop to "PostgreSQL-RDS Instance." By creating SSH tunneling from my Laptop (localhost) to Bastian Host using ODBC Driver. With this approach all the data is imported onto PBI desktop(import mode).
But our requirement is to establish connection through a direct query to refresh data real time and generate the Reports Dynamically which I am not able to.
I entered the database credentials into the Power BI desktop tool, and it not working correctly in the power bi desktop, getting a Timeout Error.
I must use direct query, I can't use import.
Any help is appreciated.
An exact error that you are getting would help get to the root cause of the issue. However, a few basic troubleshooting steps that I'd suggest are:
Ensure that you have a compatible version of the software installed on your machine such as the Npgsql-4.0.9. AT times the latest version of the software usually causes issues.
Ensure that you remove the semicolon at the end of the query.
Once you get the query running successfully on the desktop version, when you publish it to the web version, the visuals will not be able to connect to the database unless an on-premises data gateway is setup. To do so, more details on setting up a data gateway to automatically refresh the dataset for the power bi web version are here:
Refresh AWS RDS database from Power BI Web you are successfully able to query directly
Situation:
Have created today a new Compose for MongoDB Service instance in Bluemix
Need:
I have to access this MongoDB DIRECTLY with tools (eg. Mongo Managemant Studio Pro, mongo.exe, etc.) for bulkloading, testing, ad-hoc data fix, etc.
Problem:
I have not found any docs, samples nor a CLEAR statement that
a) gives me some confirmation that THIS is possible
b) gives me COMPLETE information (not just some technical fragments that might have worked year ago) how to do it.
Maybe I am looking to the wrong places or do not know the right people. However I am stuck on this, and before quitting Bluemix MongoDB maybe somebody has a copy/past solution or handson step by step manual.
Any help welcome. Thanks!
Connecting to MongoDB service in Bluemix from an application is possible. For this answer I have used the application "Robo3T" and here are the steps:
Access your MongoDB Service on you Bluemix account. Usually under
"Cloud Foundry Services"
Open section "Manage", from "Connection Settings" copy from "HTTPS" the connection address and port. In this example "sl-eu-lon-2-portal.5.dblayer.com" and "20651"
In Robo3T create a new connection with the connection address from previous step
In tab Authentication configure database name, username and password
. The credentials are found as in step 1
From "Connection Settings" copy the SSL Certificate into a text file and save locally.
In Robo3T Add the certificate to the connection in the "SSL" tab
Test the connection and save the settings
Answer
YES, Bluemix hosted Compose for MongoDB instances can be connected from the mongo Shell and some updated DB Managment tools.
However, you have to make sure, that in case you are running the newest DB versions, that your tools (shell and DB management GUIs) comply with the newest DB features such as encryption etc.
Origin of the Problem
My problem was due to older and therefore incompatible versions of the mongo shell and DB-managment tools running against the newest MongoDB versions with their specialities on encription and multiple servers to be handled in the URI.
At least two DB managment tools are not compatible with the newest DB version and will take their time to get fixed. The problem is, that both will not tell you about this. They just do not not connect. No logs on either side. Period.
So my advise here: look for tool providers who express dedicated compliance with the specific version of your DB.
Advise to the Bluemix Team
It might not take much time to provide some sample connection strings for the most common tools like the mongo shell, MongoBooster, etc. to take the hassle and guesswork out of interpreting the Environment variables and figuring out what is needed for specific connection strings and what is not.
For instance MongoDB Atlas hosting provides for every cluster readymade connection strings for many tools you can just copy/past and done!
Connecting to Atlas took me 5 Minutes. For Bluemix I have lost hours! Not because it is complex, but because the documentation and the generated Info is somehow incomplete and messy - at least for the ones who do not connection strings for their living!
We have an application server with the following spec’s:
• Windows 2008 R2 operating system.
• All prerequisites are configures successfully and correctly: Windows roles, MSDTC and connection to SQL DB server.
• MS Reporting Services 2008 R2 are installed and configured successfully, and all reports are deployed and render with no problems.
The application server connects to SQL Server 2008 R2 DB on different server - there are no firewalls between the 2 servers , and using UDL file, the connection is always successful using windows authentication or SQL authentication on SQL Server.
When we install “K2 blackpearl 4.5 (4.10060.1.0) with Update KB001040”, the setup completes successfully but the following exception appears when we open work list, when K2 setup manager is opened for reconfiguration and when rendering any report on the report manager: “A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The semaphore timeout period has expired.)” although all DB’s are created successfully during the installation for K2. Also all other features at K2 (any feature at Management Console) and Report Manager (deployment of reports, management of data sources, and folder/report settings) works perfectly.
When we remove K2 components from the server the reporting services works successfully again, without any reconfiguration.
We tried to move the server to new environment to check if there is a problem with the server itself, all installation and configuration are completed with no problems and the error message disappeared.
We did check all of below points:
• MSDTC configuration.
• All ports are open between the 2 servers.
• SQL connection is always successful between the 2 servers.
• We have a third server with MOSS 2007 installed and it works perfectly with problems in connection to DB.
• All users used for windows services and SQL windows connection are active and configured correctly.
o Have SQL login with dbcreator and SecurityAdmin roles.
o Are added as Administrators on Application server.
• We have tries Windows authentication and SQL authentication and they all gave the same problem.
• We have used a newer version of K2 installation files “K2 blackpearl 4.5 (4.10060.1.0) with KB001320” and it failed at the last steps of installation with the same problem.
Please help on this.
(full disclosure i work for K2) and looked through our system as well as the support forum and could not find a reference to this error. From the people i talked to it appears to be a general network issue, with quite a few possible causes, including something as simple as the network card. Although I am not 100% clear on a few points you made. When you said
"following exception appears when we open work list" Where are you opening the worklist from?
When you said
"When we remove K2 components from the server the reporting services works successfully again, without any reconfiguration."
Are you getting this error in SQL Reporting Services?
You can also post a question in http://k2underground.com someone else may have seen this.
Edit I asked around and there does not seem to be any good answers to this at the moment. Would you be willing to open a K2 support ticket and let us look at the K2 logs or see the config via livemeeting? Thanks!
I've been trying for quite some time to use Entity Framework with our IBM Informix databases. Hours of searching has pointed me towards installing the IBM .NET Data Server Provider, which I have installed, however when I attempt to add a new Entity Model to my project I only have the Microsoft SQL Server Data Providers listed. Am I missing a step? Is this even possible?
I am not an expert on Windows or .NET; treat any comments I make with due caution.
Installing the .NET Data Server Provider is an important first step. You now have to make sure that you can use it to connect to the Informix databases you want to manipulate. There are several things you'll need to check here:
Is the server (meaning the Informix instance) configured to allow DRDA connections?
By default, it probably isn't.
If you're the DBSA (database system administrator), you'll need to check that you've enabled 'drsoctcp' connections on the system, and configured a server alias to use that connection.
If you're not the DBSA, you'll need to chat with your DBSA to get the relevant information.
Assuming that you have DRDA connectivity enabled at the server side, you then need to ensure you have an appropriately configured ... DSN? Your client code needs to be able to connect to the server.
There is no reason I'm aware of why it cannot be done. However, I don't know exactly how to guide you step-by-step through any of the above.
You might need to seek assistance from IBM Technical Support.
You would help everyone if you clarified which version of Informix (the DBMS) you have, along with the version information for the platform where it is running (whether Windows or Unix, and the o/s version information) - and which version of the Data Server Provider you are using (and which variant of Windows you are using it on).
I've been trying to use TransactionScope with a DB2 database (using DB2 .Net provider v 9.0.0.2 and c# 2.0) which SHOULD be supported according to IBM.
I have tried all the advice i could find on the IBM forums (such as here) to no avail.
I have enabled XA transactions on my XP Sp2 machine, tried also from a Win 2003 Server machine but i consistently get the infamous error:
ERROR [58005] [IBM][DB2/NT] SQL0998N Error occurred during
transaction or heuristic processing.
Reason Code = "16". Subcode =
"2-80004005". SQLSTATE=58005
The windows event log says:
The XA Transaction Manager attempted to load the XA resource
manager DLL. The call to LOADLIBRARY
for the XA resource manager DLL
failed:
DLL=C:\APPS\IBM\DB2v95fp2\SQLLIB\BIN\DB2APP.DLL
File=d:\comxp_sp2\com\com1x\dtc\dtc\xatm\src\xarmconn.cpp
Line=2467.
Also, granted the NETWORK SERVICE user full rights to the folder and dll.
Here's the MSDTC startup message
MS DTC started with the following
settings:
Security Configuration (OFF = 0 and
ON = 1):
Network Administration of Transactions = 0,
Network Clients = 0,
Inbound Distributed Transactions using Native MSDTC Protocol = 0,
Outbound Distributed Transactions using Native MSDTC
Protocol = 0,
Transaction Internet Protocol (TIP) = 0,
XA Transactions = 1
Any help would be much appreciated!
Thanks,
Florin
I managed to get the creaky old IBM DB2 v7 ODBC driver working in a TransactionScope. It required:
XA transactions enabled in MSDTC properties
A value entered under the registry key HKLM\SOFTWARE\Microsoft\MSDTC\XADLL with name 'DB2CLI.DLL' and value 'C:\PROGRA~1\IBM\SQLLIB\BIN\DB2CLI.DLL' (path to dll in 8.3 format - v9 uses DB2APP.DLL)
A reboot
Not closing the connection prior to the TransactionScope being disposed. It seems obvious in retrospect. :)
I'm not sure if this is relevant to your particular scenario. The IBM documentation shows reason code 16, subcode 2 as "The MSDTC is unable to register the DB2 connection." There appears to be some issue with MSDTC finding the DB2 dll - perhaps check the registry key referenced above?
I solved this issue by activating MS DTC as in the image below:
run dcomcnfg;
Component Services > Computers > My Computer > Distributed Transaction Coordinator
Select Local DTC > Properties > Security Tab:
Reboot your machine and try again. Make sure you have the latest IBM Drivers. I tested with 10.1 Fix Pack 1 and Informix 11.50.
Source: http://blogs.msdn.com/b/bill/archive/2006/12/12/using-msdtc-between-vista-clients-and-windows-2000-servers.aspx