diff --git a/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/ServerCnx.java b/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/ServerCnx.java
index d6a6dda402eca..8c6c48857f09f 100644
--- a/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/ServerCnx.java
+++ b/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/ServerCnx.java
@@ -397,7 +397,8 @@ public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws E
             // At default info level, suppress all subsequent exceptions that are thrown when the connection has already
             // failed
             if (log.isDebugEnabled()) {
-                log.debug("[{}] Got exception: {}", remoteAddress, cause);
+                log.debug("[{}] Got exception {}", remoteAddress,
+                        ClientCnx.isKnownException(cause) ? cause : ExceptionUtils.getStackTrace(cause));
             }
         }
         ctx.close();