HouYuSource commented on issue #7701:
URL:
https://github.com/apache/shardingsphere/issues/7701#issuecomment-1878215315
> @ted-w-20230331 hi!，can you tell you how did you solve it? I also
encountered this kind of problem
You can debug the SQLParserFactory static code,
1. The result of executing this code varies among different threads, and
static only executes once, so the first result must be correct;
2. This code should not be executed by an asynchronous thread because the
ClassLoader of the asynchronous thread is uncertain, which may cause SPI to
obtain an empty implementation class;
3. If it is a SpringBoot application, the current thread's ClassLoader
should be 'org.springframework.boot.loader.LaunchedURLClassLoader' to properly
initialize.
```
public final class SQLParserFactory {
static {
NewInstanceServiceLoader.register(SQLParserConfiguration.class);
}
// ...
}
```
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