HDFS-17359. EC: recheck failed streamers should only after flushing all packets. (#6503). Contributed by farmmamba.

Signed-off-by: Takanobu Asanuma <tasanuma@apache.org>
(cherry picked from commit 4f4b84698658c42efd5f7af0c6061546f6fb7ce8)

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedOutputStream.java

@@ -671,9 +671,9 @@ public class DFSStripedOutputStream extends DFSOutputStream
       // for healthy streamers, wait till all of them have fetched the new block
       // and flushed out all the enqueued packets.
       flushAllInternals();
+      // recheck failed streamers again after the flush
+      newFailed = checkStreamers();
     }
-    // recheck failed streamers again after the flush
-    newFailed = checkStreamers();
     while (newFailed.size() > 0) {
       failedStreamers.addAll(newFailed);
       coordinator.clearFailureStates();