ZOOKEEPER-4221: Improve the error message when message goes above jut…

…e.maxbufer size Author: Mathieu Marie <[email protected]> Reviewers: Damien Diederen <[email protected]>, Mate Szalay-Beko <[email protected]> Closes apache#1614 from mariemat/ZOOKEEPER-4221
RokLenarcic · Feb 26, 2021 · 94d0c4d · 94d0c4d
1 parent 37eae03
commit 94d0c4d
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/zookeeper-server/src/main/java/org/apache/zookeeper/server/NIOServerCnxn.java b/zookeeper-server/src/main/java/org/apache/zookeeper/server/NIOServerCnxn.java
@@ -545,7 +545,10 @@ private boolean readLength(SelectionKey k) throws IOException {
             return false;
         }
         if (len < 0 || len > BinaryInputArchive.maxBuffer) {
-            throw new IOException("Len error " + len);
+            throw new IOException("Len error. "
+                    + "A message from " +  this.getRemoteSocketAddress() + " with advertised length of " + len
+                    + " is either a malformed message or too large to process"
+                    + " (length is greater than jute.maxbuffer=" + BinaryInputArchive.maxBuffer + ")");
         }
         if (!isZKServerRunning()) {
             throw new IOException("ZooKeeperServer not running");