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Why Do the Modifications to /etc/security/limits.conf Not Take Effect After the ECS Restarts? Symptom Modifications to the /etc/security/limits.conf file become invalid after the ECS restarts. Possible Causes In Linux, file /etc/security/limits.conf and directory /etc/security/limits.d
Why Does the System Display a Message Indicating Invalid Credentials When I Attempt to Access a Windows ECS? Symptom When you use a local PC running Windows to access a Windows ECS using RDP (for example, MSTSC), the system displays a message indicating that the credentials are invalid
How Can I Use FTP to Transfer Files from a Local Windows Computer to a Windows or Linux ECS? Scenarios You want to use FTP to transfer files from a local Windows computer to an ECS. Prerequisites An EIP has been bound to the ECS and access to TCP port 21 is allowed in the inbound
How Can I Check Whether the ECSs Attached with the Same Shared SCSI Disk Are in the Same ECS Group? Scenarios Shared EVS disks of the SCSI type support SCSI locks. To improve data security, the shared EVS disks of the SCSI type must be attached to the ECSs in the same anti-affinity
What Can I Do If the Data Migration Fails Because the DLI Throttling Threshold Has Been Reached? Symptom A big data migration task failed, and the error message "The throttling threshold has been reached" was displayed for the Spark job on DLI. Possible Causes The number of created
What Should I Do If an ECS Cannot Connect to an RDS for SQL Server Instance Through a Private Network? Perform the following steps to identify the problem: Check whether the ECS and RDS for SQL Server instance are located in the same VPC. If they are in the same VPC, go to 2. If they
Do I Need to Install IPsec Software on Each Server That Needs to Access an ECS to Establish a VPN Connection? No. VPN connects two LANs. Multiple servers in the on-premises data center use the same public IP address to access the cloud. If you install IPsec software on the on-premises
How Do I Check Whether a Back-to-Origin IP Address Has Been Whitelisted on My Origin Server? Check servers and security devices to ensure that they have whitelisted the back-to-origin IP addresses and will not limit or block access traffic. For example: If your origin servers are
Will My Access Be Restricted by Bandwidth When I Connect to My Instance from an ECS over a Private Network? No. Parent Topic: Database Connection
What Should I Do If an ECS and RDS Instance Deployed in Different VPCs Cannot Communicate with Each Other? Change the VPC hosting the ECS to the same as that hosting the RDS. Create a VPC peering connection. Parent Topic: Database Connection
Can I Continue to Use the Remaining Quota of a Free Package Next Month If It Has Not Been Used Up? Currently, the quotas of free packages within a given validity period can be combined. As long as a package has not expired, you can continue to use its remaining quota the following
What Should I Do If My ECS Fails to Access a Server on the Public Network Through a Public NAT Gateway? TCP connection may fail when an ECS accesses a server on the public network through an SNAT rule. Perform the following steps to locate the fault cause: Run the following command
How Do I Configure an ECS, a BMS, or an Image File Before I Use It to Create an Image? ECS or Image File Configurations Table 1 ECS configurations OS Configuration Windows Configuring DHCP Enabling Remote Desktop Connection Installing the One-Click Password Reset Plug-In (Optional
What Should I Do If I Can't Connect to My ECS (Microsoft SQL Server) Instance? Error message: The TCP/IP connection to the host 100.xxx.xx.xx, port xxx has failed. Error cause: The port number of the self-built database is incorrect, or the network is disconnected. Solution: Ensure
Why Does the Spark Streaming Application Fail to Be Started from the Checkpoint When the Input Stream Has No Output Logic? Question One input stream was created for the Spark Streaming application, but the input stream had no output logic. The application failed to be started from
How Do I Obtain My Disk Device Name in the ECS OS Using the Device Identifier Provided on the Console? Scenarios You find that the device name displayed in the ECS OS is different from that displayed on the management console and you cannot determine which disk name is correct. This
Why Are OBS Resources Still Unavailable Even Though My Account Has a Valid Payment Method and There Are No Outstanding Bills? On the Overview page of Billing Center, check whether your account has an outstanding amount. If your account has an outstanding amount, your payment failed
Why Does the System Display Invalid Certificate or Associated Chain When I Log In to a Windows ECS from a Mac? Symptom When you use Microsoft Remote Desktop for Mac to remotely access a Windows ECS, the system displays invalid certificate or associated chain. Figure 1 Microsoft Remote
How Do I Enable My ECS to Boot From the Second Kernel If It Fails to Boot from the First Kernel? Scenarios The operations described in this section apply to ECSs running CentOS or EulerOS with at least two kernels installed. CentOS 6 Log in to the management console, restart the ECS
Can I Upgrade Version for a DCS Redis Instance, for Example, from Redis 4.0 to Redis 5.0? No. Different Redis versions use different underlying architectures. The Redis version used by a DCS instance cannot be changed once the instance is created. If your service requires the features
