From 0e910a1dbc5a4457fd2218e9830476bf831e964a Mon Sep 17 00:00:00 2001
From: Micah Jaffe <31011877+micah-jaffe@users.noreply.github.com>
Date: Tue, 13 Aug 2019 11:49:40 -0700
Subject: [PATCH] Updated logging message around ShardEnd checkpointing
 failures (#590)

---
 .../kinesis/clientlibrary/lib/worker/ShutdownTask.java         | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/amazonaws/services/kinesis/clientlibrary/lib/worker/ShutdownTask.java b/src/main/java/com/amazonaws/services/kinesis/clientlibrary/lib/worker/ShutdownTask.java
index f1e15ae7..f062d745 100644
--- a/src/main/java/com/amazonaws/services/kinesis/clientlibrary/lib/worker/ShutdownTask.java
+++ b/src/main/java/com/amazonaws/services/kinesis/clientlibrary/lib/worker/ShutdownTask.java
@@ -114,7 +114,8 @@ class ShutdownTask implements ITask {
                     if ((lastCheckpointValue == null)
                             || (!lastCheckpointValue.equals(ExtendedSequenceNumber.SHARD_END))) {
                         throw new IllegalArgumentException("Application didn't checkpoint at end of shard "
-                                + shardInfo.getShardId());
+                                + shardInfo.getShardId() + ". Application must checkpoint upon shutdown. " +
+                                "See IRecordProcessor.shutdown javadocs for more information.");
                     }
                 }
                 LOG.debug("Shutting down retrieval strategy.");