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What Do I Do If the Disks of a CentOS ECS Created from an Image Cannot Be Found? Symptom When you started a CentOS ECS, the system cannot find disks. Generally, this is because the xen-blkfront.ko module was not loaded during the startup. You need to modify OS kernel startup parameters
How Can I Back Up the Current Status of an ECS for Restoration in the Case of a System Fault? You can back up the ECS in any of the following ways: (Recommended) Use CBR to create a scheduled backup for the ECS. If the ECS fails, select a backup you want to use to restore the ECS,
Why Is a Message Displayed Indicating That My Account Is In Arrears Even If My Account Has Balance? Symptom When the account is reset and has balance, a message is displayed indicating that the account is in arrears during namespace creation. Solution Log out and log in again, or
Can the SMS API Be Called by an Internal Network (For Example, an ECS Server)? No. The SMS API cannot be called by an internal network. If you are using a HUAWEI CLOUD ECS, apply for an EIP to access the SMS service through the public network. Parent topic: Secondary Development
Error Message "AttributeError: 'NoneType' object has no attribute 'dtype'" Displayed in Logs Symptom Code can run properly in the notebook Keras image. When tensorflow.keras is used for training, error message "AttributeError: 'NoneType' object has no attribute 'dtype'" is displayed
Migrating Data from a Self-Managed SQL Server Database on an ECS to an RDS for SQL Server DB Instance Scenarios You have created a Microsoft SQL Server database on an ECS. The self-managed SQL Server database version on the ECS cannot be later than the version of the RDS for SQL Server
Why Does a New Application Fail If a NodeManager Has Been in Unhealthy Status for 10 Minutes? Question Why does a new application fail if a NodeManager has been in unhealthy status for 10 minutes? Answer When nodeSelectPolicy is set to SEQUENCE and the first NodeManager connected
How Do I Do If the Application Operation Page Has Black Borders and Cannot Be Moved? Symptom The operation pages of some applications have black borders and cannot be moved. See Figure 1. Figure 1 Symptom example Solution Log in to the APS where the application is published as the
What Can I Do If Extended High-Concurrency Access Has Caused ClickHouse to Become Unavailable? Symptom There are too many concurrent ClickHouse requests, and new requests cannot be handled, affecting service availability. The error information is as follows: DB::Exception: Too many
Why Does a New Application Fail If a NodeManager Has Been in Unhealthy Status for 10 Minutes? Question Why does a new application fail if a NodeManager has been in unhealthy status for 10 minutes? Answer When nodeSelectPolicy is set to SEQUENCE and the first NodeManager connected
How Do I Set an Independent Oracle Account That Has the Least Privilege and Uses DRS? To perform a full migration for an Oracle database, you must grant the CREATE SESSION, SELECT ANY TRANSACTION, SELECT ANY TABLE, and the SELECT ANY DICTIONARY permissions to the user. If you need
What Can I Do If the Buffer and Cache Occupy Too Much Memory of a Linux ECS? Symptom When querying the system memory usage using free after the Linux ECS runs for a long period, you have found that most of the memory is used by buffers and cache. Possible Cause In Linux memory management
How Do I Change the Login Mode of a Linux ECS from Key Pair to Password? Scenarios This section describes how to change the login mode of a Linux ECS from key pair to password. Procedure Use the key pair to log in to the Linux ECS and set the password of user root. sudo passwd root
Why Does It Take a Long Time to Connect to an ECS Using SSH After UseDNS Is Enabled? Symptom It takes a long time to connect to an ECS using SSH. Possible Causes After the UseDNS option is enabled for the sshd service on the SSH server, when a client attempts to connect to the server
Why Does BSOD Occur When I Log In to an ECS Using Remote Desktop Connection? Symptom When you attempt to use a remote desktop connection to log in to an ECS running Windows Server 2012 R2 from a local computer with redirected drive enabled, BSOD occurs. Root Cause The remote desktop
How Do I Enable or Disable a Windows ECS Firewall and Add Port Exceptions to the Firewall? Scenarios This section describes how to enable and disable a Windows ECS firewall and add a port exception to the firewall. The following operations are performed on an ECS running Windows Server
What Can I Do If My Windows ECS Can Ping a Website but Cannot Access it? Symptom Your Windows ECS cannot access websites or applications after running for a long time. You can remotely log in to the ECS and ping websites using the ECS, but it failed to access websites or applications
How Do I Troubleshoot Blue Screen or Black Screen Errors After an ECS Is Started? Symptom When you are remotely logging in to an ECS, a screen that's black or blue is displayed. Root Cause The blue screen or black screen errors are caused by explorer.exe errors in Windows. explorer.exe
What Can I Do If the Permissions on the Root Directory of My CentOS ECS Changed to 777? Symptom You executed the chmod -R 777 / command on your ECS running CentOS, and the permissions on the root directory were changed to 777. As a result, most services were unavailable and most commands
Why No Audio File Can Be Properly Played on My Windows ECS Logged In Using VNC? Symptom When I logged in to my Windows ECS using MSTSC, audio files can be properly played. However, when I logged in to that ECS using VNC, audio files failed to be played. Possible Causes VNC does not
