Error
Error Code:
5159
SAP S/4HANA Error 5159: Concurrent XML Parsing
Description
This error indicates that the SAP S/4HANA system attempted to initiate a new XML parsing operation while another progressive XML parsing process was already active. It typically occurs in scenarios involving complex data exchanges or UI rendering where XML data is processed asynchronously or in stages, leading to an overlap.
Error Message
ERR_TEXT_COMMON_XML_PARSE_DURING_PARSE
Known Causes
3 known causesOverlapping UI Actions
Multiple user interface actions or background processes are simultaneously triggering XML parsing, leading to a conflict.
Rapid Data Submissions
Users or automated processes submit or update data too quickly, causing successive XML parsing requests to overlap.
Large or Complex XML Data
An unusually large or intricately structured XML document requires extended parsing time, causing subsequent requests to overlap.
Solutions
3 solutions available1. Restart SAP Application Server Instances easy
A simple restart can resolve temporary resource contention issues leading to concurrent XML parsing errors.
1
Identify the SAP application server instances experiencing the error. This can often be done by checking the system logs (SM21) or the work process traces (ST11).
2
Access the SAP system via SAP GUI or command line.
3
Execute the transaction code `SM51` to view the available application servers.
4
For each affected instance, select the instance and then navigate to 'Instance' -> 'Stop' -> 'Local'. Wait for the instance to stop gracefully.
5
Once all affected instances have stopped, start them again by selecting the instance and navigating to 'Instance' -> 'Start'.
6
Monitor the system logs (`SM21`) to confirm the error is no longer occurring.
2. Analyze and Optimize XML Processing Logic medium
Investigate the specific ABAP programs or services that are triggering concurrent XML parsing and optimize their resource usage.
1
Identify the ABAP programs or services that are frequently associated with the Error 5159. This can be done by correlating timestamps of the error with program execution in transaction `ST05` (Performance Analysis) or by analyzing work process traces (`ST11`).
2
Examine the ABAP code for XML parsing operations (e.g., using `CALL TRANSFORMATION`, `CREATE OBJECT cl_xml_document`, `cl_ixml`).
3
Look for patterns where multiple processes or threads might be attempting to parse the same or similar XML data concurrently without proper synchronization mechanisms.
4
Implement synchronization mechanisms like `ENQUEUE`/`DEQUEUE` or semaphores in ABAP to ensure that only one process parses critical XML data at a time, if the logic allows for it and it's causing contention.
5
Consider optimizing the XML parsing itself by ensuring that large XML documents are processed efficiently, perhaps by streaming if possible, and by avoiding unnecessary re-parsing.
6
If the XML data is being retrieved from external sources, investigate if those sources can provide data in a more optimized format or if the retrieval process can be batched or serialized.
7
Test the changes thoroughly in a development or quality system before deploying to production.
3. Review and Adjust SAP Kernel Parameters advanced
Certain kernel parameters related to memory and process management can influence concurrent processing and might need tuning.
1
Access the SAP system's profile parameters using transaction `RZ10` or `RZ11`.
2
Focus on parameters related to memory allocation and work process configuration. While there isn't a direct parameter for 'concurrent XML parsing', parameters affecting shared memory, buffer sizes, and the number of work processes can indirectly impact this.
3
Consider parameters like `ztta/roll_area`, `abap/heap_area_dia`, `abap/heap_area_non_dia`, `rdisp/wp_no_dia`, `rdisp/wp_no_btc`, `rdisp/wp_no_spo`, `rdisp/wp_no_enq`.
4
Consult SAP Notes relevant to Error 5159 and general performance tuning for your specific S/4HANA version. SAP often provides recommendations for parameter settings based on system load and configuration.
5
Make changes to parameters incrementally and monitor the system's behavior closely after each change. **Caution:** Incorrect parameter changes can severely impact system stability.
6
A restart of the application server instances is usually required for profile parameter changes to take effect.