How To Fix ESH_SEARCH135 - Sending to HTTP client: HTTP connection has invalid state

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_SEARCH - ESH Search

• Message number: 135

• Message text: Sending to HTTP client: HTTP connection has invalid state

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ESH_SEARCH135 - Sending to HTTP client: HTTP connection has invalid state ?

  The SAP error message ESH_SEARCH135 with the description "Sending to HTTP client: HTTP connection has invalid state" typically occurs in the context of the SAP Enterprise Search (ESH) or when dealing with HTTP connections in SAP systems. This error indicates that there is an issue with the state of the HTTP connection when the system attempts to send a response to the client.
  Causes:
  
  Connection Timeout: The HTTP connection may have timed out, leading to an invalid state when the system tries to send data.
  Network Issues: Intermittent network issues or disruptions can cause the connection to become invalid.
  Client-Side Issues: The client application may have closed the connection or may not be in a state to receive data.
  Server Configuration: Misconfigurations in the server settings or HTTP connection parameters can lead to this error.
  Resource Limitations: The server may be under heavy load, causing it to fail to maintain valid connections.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the SAP server and the client. Test the connection stability.
  Increase Timeout Settings: If the issue is related to timeouts, consider increasing the timeout settings for HTTP connections in the SAP system.
  Review Client Application: Ensure that the client application is functioning correctly and is capable of handling the responses from the SAP server.
  Monitor Server Load: Check the server load and performance metrics. If the server is overloaded, consider scaling resources or optimizing performance.
  Check SAP Notes: Look for any relevant SAP Notes or patches that address this specific error. SAP frequently releases updates that may resolve known issues.
  Review HTTP Connection Settings: Verify the configuration settings for HTTP connections in the SAP system. Ensure that they are set up correctly.
  Restart Services: If the issue persists, consider restarting the relevant services or the entire SAP system to reset the connection states.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for Enterprise Search and HTTP connection management for more detailed guidance.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  System Logs: Check the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem continues after trying the above solutions, it may be beneficial to involve your SAP Basis team or SAP support for further investigation.