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https://issues.apache.org/jira/browse/HDFS-16660?focusedWorklogId=790638&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-790638
 ]

ASF GitHub Bot logged work on HDFS-16660:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 14/Jul/22 00:14
            Start Date: 14/Jul/22 00:14
    Worklog Time Spent: 10m 
      Work Description: goiri commented on code in PR #4561:
URL: https://github.com/apache/hadoop/pull/4561#discussion_r920606905


##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/client/IPCLoggerChannel.java:
##########
@@ -394,46 +361,43 @@ public ListenableFuture<Void> sendEdits(
     
     ListenableFuture<Void> ret = null;
     try {
-      ret = singleThreadExecutor.submit(new Callable<Void>() {
-        @Override
-        public Void call() throws IOException {
-          throwIfOutOfSync();
-
-          long rpcSendTimeNanos = System.nanoTime();
-          try {
-            getProxy().journal(createReqInfo(),
-                segmentTxId, firstTxnId, numTxns, data);
-          } catch (IOException e) {
-            QuorumJournalManager.LOG.warn(
-                "Remote journal " + IPCLoggerChannel.this + " failed to " +
-                "write txns " + firstTxnId + "-" + (firstTxnId + numTxns - 1) +
-                ". Will try to write to this JN again after the next " +
-                "log roll.", e); 
-            synchronized (IPCLoggerChannel.this) {
-              outOfSync = true;
-            }
-            throw e;
-          } finally {
-            long now = System.nanoTime();
-            long rpcTime = TimeUnit.MICROSECONDS.convert(
-                now - rpcSendTimeNanos, TimeUnit.NANOSECONDS);
-            long endToEndTime = TimeUnit.MICROSECONDS.convert(
-                now - submitNanos, TimeUnit.NANOSECONDS);
-            metrics.addWriteEndToEndLatency(endToEndTime);
-            metrics.addWriteRpcLatency(rpcTime);
-            if (rpcTime / 1000 > WARN_JOURNAL_MILLIS_THRESHOLD) {
-              QuorumJournalManager.LOG.warn(
-                  "Took " + (rpcTime / 1000) + "ms to send a batch of " +
-                  numTxns + " edits (" + data.length + " bytes) to " +
-                  "remote journal " + IPCLoggerChannel.this);
-            }
-          }
+      ret = singleThreadExecutor.submit(() -> {
+        throwIfOutOfSync();
+
+        long rpcSendTimeNanos = System.nanoTime();
+        try {
+          getProxy().journal(createReqInfo(),
+              segmentTxId, firstTxnId, numTxns, data);
+        } catch (IOException e) {
+          QuorumJournalManager.LOG.warn(

Review Comment:
   Use {}





Issue Time Tracking
-------------------

    Worklog Id:     (was: 790638)
    Time Spent: 40m  (was: 0.5h)

> Improve Code With Lambda in IPCLoggerChannel class
> --------------------------------------------------
>
>                 Key: HDFS-16660
>                 URL: https://issues.apache.org/jira/browse/HDFS-16660
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: ZanderXu
>            Assignee: ZanderXu
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> Improve Code With Lambda in IPCLoggerChannel class



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