tidy exception reporting

Author: vladak

opengrok-indexer/src/main/java/org/opengrok/indexer/index/IndexDatabase.java

@@ -1921,9 +1921,8 @@ private void indexParallel(String dir, IndexDownArgs args) throws IndexerExcepti
         } catch (InterruptedException | ExecutionException e) {
             int successCount = successCounter.intValue();
             double successPct = 100.0 * successCount / worksCount;
-            String exmsg = String.format("%d successes (%.1f%%) after aborting parallel-indexing",
-                successCount, successPct);
-            LOGGER.log(Level.SEVERE, exmsg, e);
+            LOGGER.log(Level.SEVERE, String.format("%d successes (%.1f%%) after aborting parallel-indexing",
+                    successCount, successPct));
             throw new IndexerException(e);
         }
 

opengrok-indexer/src/main/java/org/opengrok/indexer/index/Indexer.java

@@ -427,7 +427,7 @@ public static int runMain(String[] argv) {
         } catch (IndexerException ex) {
             // The exception(s) were logged already however it does not hurt to reiterate them
             // at the very end of indexing (sans the stack trace) since they might have been buried in the log.
-            LOGGER.log(Level.SEVERE, "Indexer failed", ex);
+            LOGGER.log(Level.SEVERE, "Indexer failed with IndexerException");
             int i = 0;
             if (ex.getSuppressed().length > 0) {
                 LOGGER.log(Level.INFO, "Suppressed exceptions ({0} in total):", ex.getSuppressed().length);