do not log stack trace for CacheException reporting disabled cache annotation

fixes #4596

Author: vladak

opengrok-indexer/src/main/java/org/opengrok/indexer/history/CacheException.java

@@ -18,7 +18,7 @@
  */
 
 /*
- * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
  */
 package org.opengrok.indexer.history;
 
@@ -32,6 +32,7 @@ public class CacheException extends Exception {
     private static final long serialVersionUID = 1L;
 
     private final Level level;
+    private final boolean logTrace;
 
     /**
      * Construct a {@code CacheException} with the specified message.
@@ -50,6 +51,20 @@ public CacheException(String msg) {
     public CacheException(String msg, Level level) {
         super(msg);
         this.level = level;
+        this.logTrace = true;
+    }
+
+    /**
+     * Construct a {@code CacheException} with the specified message and log level
+     * and whether to log stack trace.
+     * @param msg message
+     * @param level suggested log level
+     * @param logTrace whether to log stack trace
+     */
+    public CacheException(String msg, Level level, boolean logTrace) {
+        super(msg);
+        this.level = level;
+        this.logTrace = logTrace;
     }
 
     /**
@@ -60,6 +75,7 @@ public CacheException(String msg, Level level) {
     public CacheException(Throwable cause) {
         super(cause);
         this.level = Level.WARNING;
+        this.logTrace = true;
     }
 
     /**
@@ -71,6 +87,7 @@ public CacheException(Throwable cause) {
     public CacheException(String msg, Throwable cause) {
         super(msg, cause);
         this.level = Level.WARNING;
+        this.logTrace = true;
     }
 
     /**
@@ -79,4 +96,8 @@ public CacheException(String msg, Throwable cause) {
     public Level getLevel() {
         return level;
     }
+
+    public boolean isLogTrace() {
+        return this.logTrace;
+    }
 }

opengrok-indexer/src/main/java/org/opengrok/indexer/history/HistoryGuru.java

@@ -1180,7 +1180,7 @@ public void createAnnotationCache(File file, String latestRev) throws CacheExcep
         if (!repository.isWorking() || !repository.isAnnotationCacheEnabled()) {
             throw new CacheException(
                     String.format("repository %s does not allow to create annotation cache for '%s'",
-                            repository, file), Level.FINER);
+                            repository, file), Level.FINER, false);
         }
 
         LOGGER.finest(() -> String.format("creating annotation cache for '%s'", launderLog(file.toString())));

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

@@ -1306,7 +1306,7 @@ private static void createAnnotationCache(File file, Document doc) {
                 // call above) directly.
                 HistoryGuru.getInstance().createAnnotationCache(file, lastRev);
             } catch (CacheException e) {
-                LOGGER.log(e.getLevel(), "failed to create annotation", e);
+                LOGGER.log(e.getLevel(), "failed to create annotation", e.isLogTrace() ? e : e.getMessage());
             }
         }
     }