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Studio is starting with the incorrect JDK even though it's specifically set in JAVA_HOME and the <Studio Home>\Talend-Studio-win-x86_64.ini file.
Please edit and update the -vm option contained within the startup shortcut with correct JDK.
If Studio is launched with a startup shortcut, it may contain a -vm option pointing to a different JDK(old JDK) than the correct one which is already set in the ini file or JAVA_HOME variable.
setting-up-java_home-for windows
When using Talend Studio, you may encounter the following error while attempting to open a remote project or apply a patch update:
javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
This error typically arises due to a missing or untrusted certificate in the Java keystore required to establish a secure connection. This article provides step-by-step instructions to resolve this issue in two common scenarios:
Verify Java Version:
Download and Install the Required CA Certificate:
Import the CA Certificate into Java Keystore:
Locate the cacerts file (typically at <JAVA_HOME>/jre/lib/security/cacerts).
Open a command prompt or terminal and navigate to the directory containing your cacerts file.
Use the keytool command to import the certificate:
keytool -import -alias <alias_name> -file <path_to_certificate_file> -keystore <path_to_your_jdk>/jre/lib/security/cacerts
Replace:
When prompted, enter the keystore password (default is changeit).
Verify the Import:
List the certificates in the cacerts file using:
keytool -list -v -keystore <path_to_your_jdk>/jre/lib/security/cacerts
Ensure the imported certificate appears in the list.
Verify Java Version:
Download Required CA Certificate:
Import the Certificate into Java Keystore:
Configure Talend Studio to Use the Updated Keystore:
Add the following JVM argument to your Talend Studio talend.ini file:
-Djavax.net.ssl.trustStore=<path_to_your_jdk>/jre/lib/security/cacerts
Replace <path_to_your_jdk> with the path to your JDK installation.
If you are operating behind a corporate proxy, you may need to import the proxy server's SSL certificate into your Java keystore. Similarly, any specific corporate firewall rules that could be blocking connections to Talend Cloud should be reviewed and configured to allow necessary traffic.
The purpose of this technical note is to provide starting guidance on what to consider when selecting hardware for the Qlik Associative Engine in Qlik Sense® and QlikView® deployments.
Server selection for any given customer should be based on recommendations and tests provided by trained Qlik professionals. For information on how to contact Qlik's Professional Services, see How and when to contact Qlik's Professional Services and Consulting Teams.
In current generations (2023) of processors, there is not much difference between AMD and Intel.
More RAM allows more result sets to be cached, which typically results in better performance.
The Qlik Associative Engine allocates memory uniformly over all available RAM, which means that it is important to always have the amount of memory per CPU socket evenly distributed.
For information on the memory configurations for best performance (including which RAM configurations can be deployed whilst keeping the bus speed as high as possible), contact the server manufacturer.
To compare the performance of different servers, you can use the theoretical calculation capacity:
Theoretical Calculation Capacity=#sockets ×#CPU cores×base clock speed
This gives the theoretical number of calculations that a server can do every second. Servers with higher theoretical calculation capacity generally perform better than servers with lower theoretical calculation capacity.
New architectures usually improve on the number of instructions per clock cycle and thus provide improved performance in comparison to older architectures.
Since the Qlik Associative Engine is good at using memory as well as the processing capacity of all CPUs, the chipset architecture must provide fast communication between the CPU sockets to keep the latency towards the memory as low as possible. Chipset architectures that allow for direct connections between all available CPU sockets via high bandwidth links are therefore preferred.
It is important to find a good balance between the core count and the clock speed. Even though the Qlik Associative Engine is very good at multi-threading and uses all cores available to it, some procedures are still single-threaded and run faster with higher clock speed.
Server BIOS and operating system settings can have a significant impact on the performance of Qlik Sense and QlikView deployments. For more information on the recommended settings please visit Quick tips #8 - Server settings for best performance.
The attached recommendations are stored for archival purposes. No additional .pdf's will be created. Server selection for any given customer should be based on recommendations and tests provided by Qlik professional services.
This article aims to explain how SQL server T-log cleans up works when Microsoft replication\publication is enabled on the database.
When the Qlik Replicate task first time runs to capture CDC, Qlik Replicate will create a publication on the database with required articles. As part of this publication log reader agent job also will be created and this job will continuously run to mark replicated transactions on the database.
Apart from the Replicate process, there will be a transactional log backup job that will run every 15 mins or 30 mins depends on source team policy. As part of this log backup job, all the transactions will be backup up to that point in time and truncate all replicated and committed transactions from T-log.
Assume, there is a scheduled t-log backup job going to run at 10 am, and the replicate task is reading transaction log with 5 mins latency, there is a high possibility that the backup job will remove the transaction(s) from a transactional log which hasn't read by the Qlik Replicate. In this scenario, the Qlik Replicate task will be failed with a missing LSN error.
To prevent such kinds of issues Qlik Replicate implemented an option to hold T-log for a couple of mins without truncating based on the below setting:
Qlik Replicate creates an internal table called attrep_truncation_safeguard on the source database and always runs two update queries (2 update queries for each Qlik Replicate task running on the database) without commit (called Latch Lock A and B), only when you enable Start transactions in the database setting on source SQL endpoint. Qlik Replicate will update the time on these queries every 5 mins by default and we can control time by using an Option called "Apply TLOG truncation prevention policy every (seconds): ".
Here are the screenshots to explain how to check these open transactions on the database.
Customer policy adopted injection via the reverse proxy of the Content Security Policy header for security reasons.
The policy adopted is basic: default-src 'self'
Opening the QlikView AccessPoint or Qlik Sense Hub may fail or the AccessPoint may only render partially.
The Browser Debug tools will provide more insight:
QlikView
Qlik Sense Enterprise on Windows
The Header Content Security Option contains a string of rules that informs the browser which resource/code is trusted to be loaded, executed rendered.
More details on the argument could be found here:
https://www.w3.org/TR/CSP3/ ,
For QlikView Accesspoint a first example is to use Content-Security-Policy: "default-src 'self' 'unsafe-inline' data: ;" ; (note that using 'unsafe-inline' option could be unsafe in a the proxy injection scenario when the client will brose a different site , you could/evaluate to use instead the sha256-hashcode version )
Further option could be necessary if for example you have QlikView Extension Object ( Server and Document Extensions) that are using external resources downloaded from CDN locations;
In this case the troubleshoot is the same use F12/Development Tools to check the resource that violates the policy and ad an exclusion.
QlikView Access Point Shows "Loading Content" Indefinitely,
What is CSP (Content-Security-Policy) and How does it Relate to Qlik?
The eclipse OSGi framework was unable to promptly identify the installed CommandLine module.
To resolve this issue, a retry mechanism should be implemented to ensure its functionality.
Add -Dinstall.org.eclipse.equinox.p2.transport.ecf.retry=10 after mvn command.
mvn org.talend.ci:builder-maven-plugin:8.0.16:generateAllPoms \
-Dtalend.studio.p2.update='/opt/Patch_20240621_R2024-06_v1-8.0.1' \
-Dlicense.path='/opt/license' \
-Dinstaller.clean=true \
-Dstudio.error.on.component.missing=false \
-Dinstall.org.eclipse.equinox.p2.transport.ecf.retry=10 \
-s ${TALEND_SETTINGS_XML}
Talend Managemnet Console supports SingleSignOn(SSO) and integrates with several SSO platforms. In this exercise, you will activate SSO by linking your TMC with Okta which is a third-party enterprise-grade identity management service, built for the cloud, but compatible with many on-premises applications.
Check your email inbox and click on the confirmation link to activate the Okta Account
Connect to your Okta organization and add Talend Cloud as a new SSO-enabled application.
The TalendCloudDomainName attribute indicates your Talend Cloud domain. You can find the domain name in the Domain field of the Subscription page of your Talend Management Console. The NameId Format attribute indicates the email address format.
Once you set and Create the Talend Cloud SAML application, you can see the Icon created in OKTA My Apps
And TADA! You are connected to Talend. Check that your user has the roles and types you have set.
You must have the Security Administrator role in Talend Management Console and have the metadata file obtained from the SSO provider
Free Trial OKTA Account
Talend Management Center
creating-talend-cloud-application-in-okta
When customer is trying to connect to Mysql 8 DB on Talend 8 R2024-05 it is giving the below error:
===============
javax.net.ssl.SSLException: closing inbound before receiving peer's close_notify
at java.base/sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:842)
at java.base/sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:821)
===============
Customer is using MySQL Driver: mysql-connector-java-8.0.12.jar
It seems that it is a bug with the MySQL driver. It looks like sql drivers 8.0.16 and below are affected.
https://bugs.mysql.com/bug.php?id=93590
https://dev.mysql.com/doc/relnotes/connector-j/8.0/en/news-8-0-16.html
https://bugs.mysql.com/bug.php?id=93590
https://dev.mysql.com/doc/relnotes/connector-j/8.0/en/news-8-0-16.html
This article supplements documentation that requires changes to the Qlik Sense Engine Settings.ini. No settings are provided in this article.
[Settings 7]
Key=Value
If you are looking to modify the Qlik Sense Desktop client settings.ini:
Qlik Enterprise Manager (QEM) fails to monitor Qlik Replicate.
The following issues can be observed:
Possible error messages:
This is a known issue and Qlik is actively working on a patch. Please review the release notes for QB-26321 and QB-27571 for updates.
QB-26321 and QB-27571
QB-26321 and QB-27571
Three requirements need to be met in order to allow Anonymous users access to the Hub:
Useful information:
By default, anonymous access is disabled. The steps provided require a restart of the Proxy service after completion.
Anonymous users will need to have a license rule available for them which gives them either an Analyzer Capacity License or a Login Access Token. The instructions in this article will focus on Analyzter Capacity Licenses.
You can use the default Everyone stream, which has already been set up for anonymous access, or create your own.
We will create two rules. One to allow logged in (authenticated) users access and publishing permissions. One to allow anonymous user access, but no publishing permissons. Note that based on your requirements, this may need to modified.
We are now ready to test access.
After merging feature branches into the main branch in Talend Studio, several Jobs are not displayed correctly. Some Jobs are missing, while others contain incorrect files. Additionally, when importing Jobs with the same ID into Talend Studio, the following error message is displayed.
The 2 following items have the same ID, please unselect one of them:
Upon comparing the properties files of two Jobs, it was discovered that both Jobs contain the same ID. Talend Studio is unable to import Jobs with the same ID.
Please do not attempt to manually change the ID as it may lead to other dependency issues. Instead, follow the steps below to import these two Jobs that have the same ID.
Opening the Add data wizard or dragging/droping a data file into Qlik Sense Desktop, the screen hangs and the following error is displayed:
Initializing Add data
In some cases it was needed to uninstall and reinstall as below:
{error":"Migration failed, please see migraion logs for more details.","returnCode":1}
Upon reviewing the migration logs, noticed the following error.
Can't create Quartz tables: org.hibernate.exception.SQLGrammarException: could not execute statement
database schema migration failed.
javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute statement
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
at org.talend.migration.quartz.QuartzMigrationUtils.<init>(QuartzMigrationUtils.java:79)
at org.talend.migration.TalendMigrationApplication.call(TalendMigrationApplication.java:320)
at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:103)
org.hibernate.engine.query.spi.NativeSQLQueryPlan.performExecuteUpdate(NativeSQLQueryPlan.java:10)
at org.hibernate.internal.SessionImpl.executeNativeUpdate(SessionImpl.java:1509)
at
Caused by: org.postgresql.util.PSQLException: ERROR: relation "qrtz_job_details" already exists
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2725)
Note: Quartz can store Job and scheduling information in a relational database and quartz can automatically create tables with initialize-schema
Verify the list of database tables and rename or drop any tables that contain the prefix "qrtz" in their names.
Migrating database X to database Y
What does each table for quartz scheduler signify?
Talend Cloud platform provides computational capabilities that allow organizations to securely run data integration processes natively from cloud to cloud, on-premises to cloud, or cloud to on-premises environments.
These capabilities are powered by compute resources, commonly known as Engines. This article covers the four basic types.
Content:
A Cloud Engine is a compute resource managed by Talend in Talend Cloud that executes Job tasks.
A capability in Talend Cloud platform that allows you to securely run data integration Jobs natively from cloud to cloud, on-premises to cloud, or cloud to on-premises environments completely within your environment for enhanced performance and security, without transferring the data through the Cloud Engines in Talend Cloud platform.
Java-based runtime (similar to a Cloud Engine) to execute Talend Jobs on-premises or on another cloud platform that you control.
A Remote Engine Gen2 is a secure execution engine on which you can safely execute data pipelines (that is, data flows designed using Talend Pipeline Designer). It allows you to have control over your execution environment and resources because you can create and configure the engine in your own environment (Virtual Private Cloud or on-premises). Previously referred to as Remote Engines for Pipelines, this engine was renamed Remote Engine Gen2 during H1/2020. It is a Docker-based runtime to execute data pipelines on-premises or on another cloud platform that you control.
A Remote Engine Gen2 ensures:
Cloud Engine for Design is a built-in runner that allows you to easily design pipelines without setting up any processing engines. With this engine you can run two pipelines in parallel. For advanced processing of data, Talend recommends installing the secure Remote Engine Gen2.
The following table lists a comparative perspective between the two engines:
Cloud Engine (CE) |
Remote Engine (RE) |
Consumes 45,000 engine tokens |
Consumes 9,000 engine tokens |
Runs within Talend Cloud platform – no download required |
Downloadable software from Talend Cloud platform |
Managed by Talend, run on-demand as needed to execute Jobs |
Managed by the customer |
No customer resources required |
Customer can run on Windows, Linux, or OS X |
Set physical specifications (Memory, CPU, Temp Disk Space) |
Unlimited Memory, CPU, and Temp Space |
Require data sources/targets to be visible through the internet to the Cloud Engine |
Hybrid cloud or on-premises data sources |
Restricted to three concurrent Jobs |
Unlimited concurrent Jobs (default three) |
Available within Talend Cloud portal |
Available in AWS and Azure Marketplace |
Runs natively within Talend Cloud iPaaS infrastructure |
Uses HTTPS calls to Talend Cloud service to get configuration information and Job definition and schedules |
Cloud Engine for Design (CE4D) |
Remote Engine Gen 2 (REG2) |
Consumes zero engine tokens |
Consumes 9000 engine tokens |
Build upon a Docker-compose stack |
Build upon a Docker-compose stack |
Available as Cloud Image and Instantiated in Talend Cloud platform on behalf of the customer |
Available as an AMI Cloud Formation Template (for AWS) and Azure Image (for Azure) |
Not available as downloadable software as this type of engine is only suitable for design using Pipeline Designer in Talend Cloud portal |
Available as .zip or .tar.gz (for local deployment) |
A Cloud Engine for Design is included with Talend Cloud platform, to offer a serverless experience during design and testing. However, it is not meant for production (that is, not for running pipelines in non-development environments). It won’t scale for prod-size volumes and long-running pipelines. It should be used for design teams to get a preview working and test execution during development. This engine should not be used for production execution. |
It is used to run artifacts, tasks, preparations, and pipelines in the cloud, as well as creating connections and fetching data samples. |
Static IPs cannot be enabled for CE4D within Talend Management Console |
Not applicable as REG2 runs outside Talend Management Console (that is, in Customer Data Center) |
Additional engines (CE or RE) may be required if you have one or more of the following use cases:
These use cases depend on the deployment architecture in the specific customer environment and layout of the Remote Engine at the environment or workspace level configurations. This would need proper capacity planning and automatic horizontal and vertical scaling of the compute Engines.
Question |
Guideline |
How much data must be transferred per hour? |
Each Cloud Engine can transfer 225 GB per hour. |
How many separate flows can run in parallel? |
Each Cloud Engine can run up to three flows in parallel. |
How much temporary disk space is needed? |
Each Cloud Engine has 200GB of temp space. |
How CPU and memory intensive are the flows? |
Each Cloud Engine provides 8 GB of memory and two vCPU. This is shared among any concurrent flows. |
Are separate execution environments required? |
Many users desire separate execution for QA/Test/Development and Production. If this is needed, additional Cloud Engines should be added as required. |
If a source or target system is not accessible through the internet:
If one of the systems is not accessible using the internet, then a Remote Engine is needed.
When single flow requirements exceed the capacity of a Talend Cloud Engine:
If the Cloud Engine is too small (for example, the maximum memory of 5.25 GB, temporary space of 200 GB, two vCPU, or the maximum of 225 GB per hour) then, a Remote Engine is needed.
If a native driver is required:
If the solution requires a native driver, which is not part of the Talend action or Job generated code, a typical case for this is SAP with the JCO v3 Library, MS SQL Server Windows Authentication, then a Remote Engine is needed.
Data jurisdiction, security, or compliance reasons:
It may be desirable or required to retain data in a particular region or country for data privacy reasons. The data being processed may be subject to regulations such as PCI or HIPAA, or it may be more efficient to process the data within a single data center or public cloud location. These are all valid reasons to use a Remote Engine.
Cloud Engine (CE) |
Remote Engine (RE) |
Remote Engine Gen 2 (REG2) |
Cloud Engines allow you to run batch tasks that use on-premises or cloud applications and datasets (sources, targets) |
Remote Engines allow you to run batch tasks or microservices (APIs or Routes) that use on-premises or cloud applications and datasets (sources, targets) |
The Remote Engine Gen2 is used to run artifacts, tasks, preparations, and pipelines in the cloud, as well as creating connections and fetching data samples |
Consumes 45,000 engine tokens |
Consumes 9,000 engine tokens |
Consumes 9,000 engine tokens |
No download required - Runs within Talend Cloud platform |
Downloadable software from Talend Cloud platform |
Downloadable software from Talend Cloud platform |
Managed by Talend, run on-demand as needed to execute Jobs |
Managed by the customer |
Managed by the customer |
No customer resources required |
Can run on Windows, Linux, or OS X |
Require compatible Docker and Docker compose versions for Linux, Mac, and Windows |
Set physical specifications (Memory, CPU, and Temp Disk Space) |
Unlimited Memory, CPU, and Temp Space |
Unlimited Memory, CPU, and Temp Space |
Require data sources/targets to be visible through the internet to the Cloud Engine |
Hybrid cloud or on-premises data sources |
Hybrid cloud or on-premises data sources |
Restricted to three concurrent Jobs |
Unlimited concurrent Jobs (default three) |
Unlimited concurrent pipelines (configurable) |
Available within Talend Cloud portal |
Available in AWS and Azure Marketplace |
Available as an AMI Cloud Formation Template (for AWS) and Azure Image (for Azure) |
Runs natively within Talend Cloud iPaaS infrastructure |
Uses HTTPS calls to Talend Cloud service to get configuration information and Job definition and schedules |
Uses HTTPS calls to Talend Cloud service to get configuration information and pipeline definition and schedules |
Talend Help Center documentation:
When synchronizing Qlik Sense with Active Directory, you may encounter an error message saying "the User Directory Connector (UDC) is not configured, because the following error occurred: Setting up connection to LDAP root node failed. Check log file"
This often indicates a log on failure, i.e. the username and/or password is wrong.
A common cause for this is wrong username and/or password.
Using a Salesforce source endpoint, especially while using the Incremental Load source endpoint, all UPDATE operations are treated as INSERT operations for the table "UserRole". This leads to duplicate IDs found from the target table in the CDC processing stage.
Set the task to UPSERT mode with Apply Conflicts set to Update the existing target record and Insert the missing target record. For more information see Apply Conflicts.
Note: this WA applied to Apply Change Mode, if the 'store changes' are enabled, duplicate ID is presented in __ct table still.
71 objects are missing the "CreatedDate" system field (including tables "AccountShare", "UserLogin", "UserRole", and similar). This is why Qlik Replicate can't identify if the change is inserted or updated, leading to both INSERT and UPDATE being converted to INSERT operation for these tables.
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