Error
Error Code: ORA-30015

Oracle ORA-30015: Pending Undo Tablespace

📦 Oracle Database
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Description

This error indicates an attempt to perform an operation that's blocked because a previously offlined undo tablespace is still pending due to active transactions. The operation will be allowed after all transactions in the previous undo tablespace are committed.
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Error Message

ORA-30015: previously offlined undo tablespace ' string ' is still pending
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Known Causes

3 known causes
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Active Transactions Pending
The most common cause is that a previous SWITCH UNDO operation left transactions still running in the old undo tablespace.
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Slow Transaction Commit
Transactions in the previous undo tablespace are taking a long time to commit, delaying the availability of the tablespace.
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Long-Running Queries
Long-running queries that have modified data can prevent the undo tablespace from being fully released.
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

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