slfan1989 opened a new pull request, #4362:
URL: https://github.com/apache/hadoop/pull/4362
JIRA: HDFS-16597 Improve RouterRpcServer#reload With Lambda
When reading the code, I found that RouterRpcServer#reload uses the
following method to submit threads
RouterRpcServer#reload
```
public ListenableFuture<DatanodeInfo[]> reload(
final DatanodeReportType type, DatanodeInfo[] oldValue)
throws Exception {
return executorService.submit(new Callable<DatanodeInfo[]>() {
@Override
public DatanodeInfo[] call() throws Exception {
return load(type);
}
});
}
```
This place is better to use lambda .
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