com.alibaba.excel.exception.ExcelGenerateException: java.lang.OutOfMemoryError: GC overhead limit exceeded

The `com.alibaba.excel.exception.ExcelGenerateException` with the inner exception `java.lang.OutOfMemoryError: GC overhead limit exceeded` typically occurs when you are trying to generate an Excel file using the Alibaba Excel library (EExcel) in a Java application, and the JVM encounters a severe memory issue.

1. **Issue**: The `OutOfMemoryError: GC overhead limit exceeded` means that the garbage collector (GC) is unable to free up enough memory for the ongoing operation due to excessive memory usage or allocation. The 'GC overhead limit' refers to the threshold beyond which the time spent in garbage collection becomes too high, causing the application to stop processing new requests.

2. **Possible Causes**:
- Insufficient heap size: Your application might not have allocated enough memory for the task at hand, particularly when dealing with large datasets or complex formatting.
- Memory-intensive operations: Writing a large number of rows, cells, or applying heavy calculations may lead to this error.
- Memory leaks: If there are any unintentional leaks in your code where memory isn't being properly released, it can accumulate and eventually hit the limit.

3. **Solutions**:
- **Increase Heap Size**: You can try increasing the `-Xmx` flag in your `java` command-line options to allocate more memory for the JVM. However, be cautious as setting it too high might cause other problems if not managed properly.
- **Optimize memory usage**: Review your code for memory-intensive operations, consider caching or lazy loading data, and release resources when no longer needed.
- **Batch processing**: If possible, break down the generation process into smaller chunks or batches to reduce the memory footprint at any given time.
- **Use streaming APIs**: EExcel provides streaming APIs that can help reduce memory consumption by writing data one record at a time.