zhangyongxianggithub commented on issue #9839:
URL: https://github.com/apache/doris/issues/9839#issuecomment-1290200774
I had the same problem and solved this bug，fellow is my solution，the reason ：
doris fe server version is too low and your jar version is new。
the problem file is org.apache.doris.flink.rest.RestService，fellow:
```java
public static String randomBackend(DorisOptions options,
DorisReadOptions readOptions, Logger logger) throws DorisException, IOException
{
List<BackendV2.BackendRowV2> backends = getBackendsV2(options,
readOptions, logger);
logger.trace("Parse beNodes '{}'.", backends);
if (backends == null || backends.isEmpty()) {
logger.error(ILLEGAL_ARGUMENT_MESSAGE, "beNodes", backends);
throw new IllegalArgumentException("beNodes",
String.valueOf(backends));
}
Collections.shuffle(backends);
BackendV2.BackendRowV2 backend = backends.get(0);
return backend.getIp() + ":" + backend.getHttpPort();
}
```
there is two getBackends[V2] methods, one is getBackends() for old version
doris fe, another is getBackendsV2() for newer version doris fe. the
diffierences between them is url. method getBackends() will visist
/rest/v1/system?path=//backends, method getBackendsV2() will visit
/api/backends?is_alive=true, if your doris fe version is too low, your call to
getBackendsV2() will get 404.so you can write a
org.apache.doris.flink.rest.RestService or upgrade doris version
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