Naively cast unchecked exceptions

Signed-off-by: Jay Deng <jayd0104@gmail.com>

Author: jed326

server/src/main/java/org/opensearch/search/query/ConcurrentQueryPhaseSearcher.java

@@ -19,8 +19,6 @@
 import org.opensearch.search.internal.SearchContext;
 import org.opensearch.search.profile.query.ProfileCollectorManager;
 import org.opensearch.search.query.QueryPhase.DefaultQueryPhaseSearcher;
-import org.opensearch.tasks.TaskCancelledException;
-import org.opensearch.transport.TransportException;
 
 import java.io.IOException;
 import java.util.LinkedList;
@@ -92,17 +90,12 @@ private static boolean searchWithCollectorManager(
             if (re.getCause() instanceof ExecutionException || re.getCause() instanceof InterruptedException) {
                 Throwable t = re.getCause();
                 if (t.getCause() != null) {
-                    if (t.getCause() instanceof TransportException) {
-                        throw (TransportException) t.getCause();
-                    }
-                    if (t.getCause() instanceof TaskCancelledException) {
-                        throw (TaskCancelledException) t.getCause();
-                    }
+                    rethrow(t.getCause());
                 }
             }
 
             // Rethrow any unexpected exception types
-            throw re;
+            rethrow(re.getCause());
         }
         if (searchContext.isSearchTimedOut()) {
             assert timeoutSet : "TimeExceededException thrown even though timeout wasn't set";
@@ -122,4 +115,9 @@ private static boolean searchWithCollectorManager(
     public AggregationProcessor aggregationProcessor(SearchContext searchContext) {
         return aggregationProcessor;
     }
+
+    @SuppressWarnings("unchecked")
+    private static <T extends Throwable> RuntimeException rethrow(Throwable throwable) throws T {
+        throw (T) throwable; // naively cast to unchecked exception
+    }
 }