Sparx Systems Forum
Pro Cloud Server / Prolaborate / WebEA => PCS Bugs and Issues => Topic started by: Worker on May 31, 2024, 10:56:19 pm
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Do you know what could be the issue when in the PCS log appears
[WARNING]: Thread xxx Exception in CFileStream::Write while attempting to write to memory file
?
The environment:
Windows Server 2022, PCS 5.1.125 64-bit, MySQL 8.0.33
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The error message you've encountered, "Exception in CFileStream::Write while attempting to write to memory file," typically occurs in scenarios where a program or application is trying to write data to a memory file (usually a buffer in memory), but the operation fails due to various reasons. Let's break it down:
- CFileStream: This suggests that the error is related to file I/O (input/output) operations using a stream. The "C" prefix often indicates a C++ or C# context.
- Write: The error occurs during a write operation, which means the program is attempting to write data to a file or memory location.
- Memory File: In this case, the target location for writing is a memory file. A memory file is an area of memory that behaves like a file, allowing read and write operations. It's often used for temporary storage or inter-process communication.
Common reasons for encountering this error include:- Insufficient Memory: If the system runs out of available memory, writing to a memory file can fail. Ensure that your system has enough memory to accommodate the operation.
- Invalid Memory Address: The program might be trying to write to an invalid memory address. This could be due to a bug in the code, uninitialized pointers, or memory corruption.
- Permissions: If the program lacks the necessary permissions to write to the memory file, the operation will fail. Check the access rights and permissions.
- Concurrency Issues: If multiple threads or processes are accessing the same memory file concurrently, synchronization issues can lead to errors during write operations.
To troubleshoot this issue, consider the following steps:- Check Code Logic: Ask Sparx to review the code where the write operation occurs. Ask them to ensure that memory addresses and pointers are valid and properly initialized.
It is always good to report the issue in case more people are encountering the problem, and it is indeed an issue on PCS coding side - Memory Availability: Verify that there's enough available memory for the operation. If memory is scarce, consider optimizing memory usage or increasing available RAM.
- Permissions: Confirm that the program has the necessary permissions to write to the memory file. Adjust permissions if needed.
- Concurrency Handling: If multiple threads or processes are involved, implement proper synchronization mechanisms (e.g., locks, semaphores) to prevent concurrent access issues.
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BobM, you are perfectly right, but the software reporting this error is Sparx Pro Cloud Server, i.e. closed-source SW out of my control. So I have very limited possibilities to monitor what could be the issue.
Yes, concurrency may be the issue, as our model is large (~3GB, 200k packages) and traffic is at least moderate (~100 users), but I'd expect from Sparx, that while offering PCS option, such issues must be taken into consideration, tested and resolved.