Updated on 2023-09-05 GMT+08:00
Using HDFS
- All NameNodes Become the Standby State After the NameNode RPC Port of HDFS Is Changed
- An Error Is Reported When the HDFS Client Is Used After the Host Is Connected Using a Public Network IP Address
- Failed to Use Python to Remotely Connect to the Port of HDFS
- HDFS Capacity Usage Reaches 100%, Causing Unavailable Upper-layer Services Such as HBase and Spark
- An Error Is Reported During HDFS and Yarn Startup
- HDFS Permission Setting Error
- A DataNode of HDFS Is Always in the Decommissioning State
- HDFS or NameNode Failed to Start Due to Insufficient Memory
- A Large Number of Blocks Are Lost in HDFS due to the Time Change Using ntpdate
- CPU Usage of a DataNode Reaches 100% Occasionally, Causing Node Loss (SSH Connection Is Slow or Fails)
- Manually Performing Checkpoints When a NameNode Is Faulty for a Long Time
- Common File Read/Write Faults
- Maximum Number of File Handles Is Set to a Too Small Value, Causing File Reading and Writing Exceptions
- A Client File Fails to Be Closed After Data Writing
- File Fails to Be Uploaded to HDFS Due to File Errors
- After dfs.blocksize Is Configured and Data Is Put, Block Size Remains Unchanged
- Failed to Read Files, and "FileNotFoundException" Is Displayed
- Failed to Write Files to HDFS, and "item limit of / is exceeded" Is Displayed
- Adjusting the Log Level of the Shell Client
- File Read Fails, and "No common protection layer" Is Displayed
- Failed to Write Files Because the HDFS Directory Quota Is Insufficient
- Balancing Fails, and "Source and target differ in block-size" Is Displayed
- A File Fails to Be Queried or Deleted, and the File Can Be Viewed in the Parent Directory (Invisible Characters)
- Uneven Data Distribution Due to Non-HDFS Data Residuals
- Uneven Data Distribution Due to the Client Installation on the DataNode
- Handling Unbalanced DataNode Disk Usage on Nodes
- Locating Common Balance Problems
- HDFS Displays Insufficient Disk Space But 10% Disk Space Remains
- An Error Is Reported When the HDFS Client Is Installed on the Core Node in a Common Cluster
- Client Installed on a Node Outside the Cluster Fails to Upload Files Using hdfs
- Insufficient Number of Replicas Is Reported During High Concurrent HDFS Writes
- HDFS Client Failed to Delete Overlong Directories
- An Error Is Reported When a Node Outside the Cluster Accesses MRS HDFS
- "ALM-12027 Host PID Usage Exceeds the Threshold" Is Generated for a NameNode
- ALM-14012 JournalNode Is Out of Synchronization Is Generated in the Cluster
- Failed to Decommission a DataNode Due to HDFS Block Loss
- An Error Is Reported When DistCP Is Used to Copy an Empty Folder
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