pkumarsinha commented on a change in pull request #1358:
URL: https://github.com/apache/hive/pull/1358#discussion_r466574279



##########
File path: ql/src/java/org/apache/hadoop/hive/ql/exec/repl/AtlasDumpTask.java
##########
@@ -132,31 +130,40 @@ private AtlasReplInfo createAtlasReplInfo() throws 
SemanticException, MalformedU
 
   private long lastStoredTimeStamp() throws SemanticException {
     Path prevMetadataPath = new Path(work.getPrevAtlasDumpDir(), 
EximUtil.METADATA_NAME);
-    BufferedReader br = null;
+    Retryable retryable = Retryable.builder()
+      .withHiveConf(conf)
+      .withRetryOnException(IOException.class)
+      .withFailOnException(FileNotFoundException.class).build();
     try {
-      FileSystem fs = prevMetadataPath.getFileSystem(conf);
-      br = new BufferedReader(new InputStreamReader(fs.open(prevMetadataPath), 
Charset.defaultCharset()));
-      String line = br.readLine();
-      if (line == null) {
-        throw new SemanticException("Could not read lastStoredTimeStamp from 
atlas metadata file");
-      }
-      String[] lineContents = line.split("\t", 5);
-      return Long.parseLong(lineContents[1]);
-    } catch (Exception ex) {
-      throw new SemanticException(ex);
-    } finally {
-      if (br != null) {
+      return retryable.executeCallable(() -> {
+        BufferedReader br = null;
         try {
-          br.close();
-        } catch (IOException e) {
-          throw new SemanticException(e);
+          FileSystem fs = prevMetadataPath.getFileSystem(conf);
+          br = new BufferedReader(new 
InputStreamReader(fs.open(prevMetadataPath), Charset.defaultCharset()));
+          String line = br.readLine();
+          if (line == null) {
+            throw new 
SemanticException(ErrorMsg.REPL_INVALID_CONFIG_FOR_SERVICE
+              .format("Could not read lastStoredTimeStamp from atlas metadata 
file", "atlas"));
+          }
+          String[] lineContents = line.split("\t", 5);
+          return Long.parseLong(lineContents[1]);
+        } finally {
+          if (br != null) {
+            try {
+              br.close();
+            } catch (IOException e) {
+              //Do nothing
+            }
+          }
         }
-      }
+      });
+    } catch (Exception e) {
+      throw new 
SemanticException(ErrorMsg.REPL_RETRY_EXHAUSTED.format(e.getMessage()), e);

Review comment:
       yes, here we are catching as that, I was referring to line 144:if (line 
== null) {
               throw new 
SemanticException(ErrorMsg.REPL_INVALID_CONFIG_FOR_SERVICE
                 .format("Could not read lastStoredTimeStamp from atlas 
metadata file", "atlas"));
             }
   where we are throwing SemanticException already which we catch here, can't 
we just throw the same e in that case?




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