ThreadAffinityDocumentsWriterThreadPool.toString

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1588923 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lucene/core/src/java/org/apache/lucene/index/ThreadAffinityDocumentsWriterThreadPool.java b/lucene/core/src/java/org/apache/lucene/index/ThreadAffinityDocumentsWriterThreadPool.java
index a1fc118..f353431 100644
--- a/lucene/core/src/java/org/apache/lucene/index/ThreadAffinityDocumentsWriterThreadPool.java
+++ b/lucene/core/src/java/org/apache/lucene/index/ThreadAffinityDocumentsWriterThreadPool.java
@@ -81,4 +81,9 @@
     clone.threadBindings = new ConcurrentHashMap<>();
     return clone;
   }
+
+  @Override
+  public String toString() {
+    return "ThreadAffinityDocumentsWriterThreadPool(maxThreadStates=" + getMaxThreadStates() + ")";
+  }
 }