How To Fix /IWBEP/CM_COS_QRL001 - NetWeaver ôQuery Result Cacheö lock error: Try again

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_COS_QRL -

• Message number: 001

• Message text: NetWeaver ôQuery Result Cacheö lock error: Try again

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_COS_QRL001 - NetWeaver ôQuery Result Cacheö lock error: Try again ?

  The SAP error message /IWBEP/CM_COS_QRL001 related to the "Query Result Cache" lock typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a contention issue when trying to access the Query Result Cache, which is used to optimize the performance of OData queries by caching the results of previous queries.
  Cause:
  
  Concurrent Access: Multiple requests are trying to access or modify the same cache entry simultaneously, leading to a lock contention.
  Long-Running Transactions: If a transaction takes too long to complete, it can hold locks longer than expected, causing other requests to fail.
  Configuration Issues: Misconfiguration in the caching settings or the underlying database can also lead to locking issues.
  System Load: High system load or resource contention can exacerbate locking issues.
  
  Solution:
  
  Retry Mechanism: Implement a retry mechanism in your application logic to handle transient errors. This allows the application to attempt the operation again after a short delay.
  Optimize Queries: Review and optimize the OData queries to ensure they are efficient and do not hold locks longer than necessary.
  Increase Timeout Settings: If applicable, consider increasing the timeout settings for the cache or the database connections to allow longer-running queries to complete.
  Monitor System Performance: Use SAP monitoring tools to check for system performance issues, such as high CPU or memory usage, and address any bottlenecks.
  Check for Long-Running Transactions: Identify and optimize any long-running transactions that may be holding locks for extended periods.
  Review Cache Configuration: Ensure that the Query Result Cache is properly configured and that there are no issues with the underlying database or cache settings.
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide additional insights or patches related to this error. You can search the SAP Support Portal for specific notes related to /IWBEP/CM_COS_QRL001.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Transaction Codes: Use transaction codes like ST22 (Dump Analysis) and SM21 (System Log) to investigate any related dumps or logs that may provide more context on the error.
  
  If the issue persists after trying the above solutions, it may be necessary to involve SAP support for further investigation.