[GitHub] [solr] sonatype-lift[bot] commented on a diff in pull request #1126: SOLR-16462: Create v2 equivalent of v1 'CREATESNAPSHOT', 'LISTSNAPSHOT' and 'DELETESNAPSHOT' (core level)

Sun, 12 Feb 2023 16:18:00 -0800 


sonatype-lift[bot] commented on code in PR #1126:
URL: https://github.com/apache/solr/pull/1126#discussion_r1103903226


##########
solr/core/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java:
##########
@@ -493,4 +434,94 @@ public interface CoreAdminOp {
      */
     void execute(CallInfo it) throws Exception;
   }
+
+  public static class CoreAdminAsyncTracker {
+    private static final int MAX_TRACKED_REQUESTS = 100;
+    public static final String RUNNING = "running";
+    public static final String COMPLETED = "completed";
+    public static final String FAILED = "failed";
+    public final Map<String, Map<String, TaskObject>> requestStatusMap;
+
+    private ExecutorService parallelExecutor =
+        ExecutorUtil.newMDCAwareFixedThreadPool(
+            50, new 
SolrNamedThreadFactory("parallelCoreAdminAPIBaseExecutor"));
+
+    public CoreAdminAsyncTracker() {
+      HashMap<String, Map<String, TaskObject>> map = new HashMap<>(3, 1.0f);
+      map.put(RUNNING, Collections.synchronizedMap(new LinkedHashMap<>()));
+      map.put(COMPLETED, Collections.synchronizedMap(new LinkedHashMap<>()));
+      map.put(FAILED, Collections.synchronizedMap(new LinkedHashMap<>()));
+      requestStatusMap = Collections.unmodifiableMap(map);
+    }
+
+    public void shutdown() {
+      ExecutorUtil.shutdownAndAwaitTermination(parallelExecutor);
+    }
+
+    public Map<String, TaskObject> getRequestStatusMap(String key) {
+      return requestStatusMap.get(key);
+    }
+
+    public ExecutorService getParallelExecutor() {
+      return parallelExecutor;
+    }
+
+    /** Helper method to add a task to a tracking type. */
+    public void addTask(String type, TaskObject o, boolean limit) {
+      synchronized (getRequestStatusMap(type)) {
+        if (limit && getRequestStatusMap(type).size() == MAX_TRACKED_REQUESTS) 
{
+          String key = 
getRequestStatusMap(type).entrySet().iterator().next().getKey();
+          getRequestStatusMap(type).remove(key);
+        }
+        addTask(type, o);
+      }
+    }
+
+    public void addTask(String type, TaskObject o) {
+      synchronized (getRequestStatusMap(type)) {
+        getRequestStatusMap(type).put(o.taskId, o);
+      }
+    }
+
+    /** Helper method to remove a task from a tracking map. */
+    public void removeTask(String map, String taskId) {
+      synchronized (getRequestStatusMap(map)) {

Review Comment:
   <picture><img alt="5% of developers fix this issue" 
src="https://lift.sonatype.com/api/commentimage/fixrate/5/display.svg";></picture>
   
   <b>*NULLPTR_DEREFERENCE:</b>*  `Map 
CoreAdminHandler$CoreAdminAsyncTracker.getRequestStatusMap(String)` could be 
null (from the call to 
`CoreAdminHandler$CoreAdminAsyncTracker.getRequestStatusMap(...)` on line 488) 
and is dereferenced.
   
   ❗❗ <b>2 similar findings have been found in this PR</b>
   
   <details><summary>🔎 Expand here to view all instances of this 
finding</summary><br/>
     
     
   <div align=\"center\">
   
   
   | **File Path** | **Line Number** |
   | ------------- | ------------- |
   | solr/core/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java | 
[471](https://github.com/apache/solr/blob/3d8b1eb13ffc0307ec0a2d066e5e1bd40521e514/solr/core/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java#L471)
 |
   | solr/core/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java | 
[481](https://github.com/apache/solr/blob/3d8b1eb13ffc0307ec0a2d066e5e1bd40521e514/solr/core/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java#L481)
 |
   <p><a 
href="https://lift.sonatype.com/results/github.com/apache/solr/01GS3Z89WXDS3GKQY5ME5F0MAS?t=Infer|NULLPTR_DEREFERENCE"
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