Updated on 2025-07-07 GMT+08:00

DCS Pre-check

Checking the Source and Target Instance Versions

  • Check whether the source and target instance versions meet the requirements. The source DCS instance version must be 4.0, 5.0, or 6.0, and the target instance version must be 5.0. If the versions are not in the matching list, an alarm is generated.
    • Cause 1: The source DCS instance version is not supported.

      Solution: Go to the Configure Source and Target page of the professional event stream job and select a source instance that meets the version requirements.

    • Cause 2: The target DCS instance version is not supported.

      Solution: Go to the Configure Source and Target page of the professional event stream job and select a target instance that meets the version requirements.

  • Check whether the source and target DCS instances are of the same version. If not, a warning is generated.

    Cause: The source and target instances are of different versions.

    Solution: Check whether the source and target DCS instance versions are the same in the Configure Source and Target page. If not, modify the source or target instance to ensure that they are the same. Otherwise, there may be compatibility and performance risks.

Checking the Source Connectivity

Check whether the VM where the event stream job is located can connect to the source DCS instance.
  • Cause 1: The source DCS instance cannot be connected. Check whether the network configuration is correct.

    Solution:

    1. On the DCS console, check whether the source instance is normal.
    2. Check whether the VPC and subnet of the event stream cluster can connect to the source DCS instance.
  • Cause 2: The source DCS instance cannot be connected. Check whether the entered instance information is correct.

    Solution:

    1. On the DCS console, check whether the source instance is normal.
    2. Check whether the VPC and subnet of the event stream cluster can connect to the source DCS instance.
    3. Check whether the username and password of the source DCS instance configured on the Configure Source and Target page are correct.

Checking the Target Connectivity

Check whether the VM where the event stream job is located can connect to the target DCS instance.

  • Cause 1: The target DCS instance cannot be connected. Check whether the network configuration is correct.

    Solution:

    1. On the DCS console, check whether the target instance is normal.
    2. Check whether the VPC and subnet of the event stream cluster can connect to the target DCS instance.
  • Cause 2: The target DCS instance cannot be connected. Check whether the entered instance information is correct.

    Solution:

    1. On the DCS console, check whether the target instance is normal.
    2. Check whether the VPC and subnet of the event stream cluster can connect to the target DCS instance.
    3. Check whether the username and password of the target DCS instance configured on the Configure Source and Target page are correct.

Checking the Source and Target Instance Specifications

Check whether the specifications of the source and target DCS instances match.

Cause: The specifications of the source and target DCS instances are inconsistent.

Solution: Check whether the specifications of the source and target DCS instances are the same on the Configure Source and Target page. If not, modify the source or target instance to ensure that the specifications are the same.

Checking the Source and Target Instance Configuration

Cause: In the sync scenario, change the value of eventlog to true and disable the client IP pass-through configuration of the source and target DCS instances.

Solution: Check whether the eventlog parameter has been set to true and whether the client IP pass-through configuration has been disabled for the source and target DCS instances. If not, modify the configuration.

Checking the Source and Target Instance IDs

Cause: The IDs of the source and target DCS instances are the same.

Solution: Check whether the source and target DCS instances are the same. If they are the same, change them to different instances.

Checking the Addresses of the Source and Target Instances

Check whether the source and target instance have the same IP address.

Cause: The source and target DCS instances have the same IP address. Check the node IP addresses of the source and target instances.

Solution: Check the node connection addresses and IP addresses of the source and target instances. If they use the same IP address, modify either the source or target instance to ensure the IP addresses are unique.