HDFS-13789. Reduce logging frequency of QuorumJournalManager#selectInputStreams. Contributed by Erik Krogen.

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

@@ -496,8 +496,10 @@ public class QuorumJournalManager implements JournalManager {
     // the cache used for RPC calls is not enabled; fall back to using the
     // streaming mechanism to serve such requests
     if (inProgressOk && inProgressTailingEnabled) {
-      LOG.info("Tailing edits starting from txn ID " + fromTxnId +
-          " via RPC mechanism");
+      if (LOG.isDebugEnabled()) {
+        LOG.debug("Tailing edits starting from txn ID " + fromTxnId +
+            " via RPC mechanism");
+      }
       try {
         Collection<EditLogInputStream> rpcStreams = new ArrayList<>();
         selectRpcInputStreams(rpcStreams, fromTxnId, onlyDurableTxns);