From 0e341a2a9a43d7556e27ef3739123a378dde3a53 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Mon, 20 Jul 2020 18:26:59 -0700
Subject: [PATCH] error logging

---
 .../client/src/main/java/seaweedfs/client/SeaweedRead.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java b/other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java
index fbc3296ae..97da29447 100644
--- a/other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java
+++ b/other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java
@@ -40,7 +40,8 @@ public class SeaweedRead {
         int startOffset = bufferOffset;
         for (ChunkView chunkView : chunkViews) {
             FilerProto.Locations locations = vid2Locations.get(parseVolumeId(chunkView.fileId));
-            if (locations.getLocationsCount() == 0) {
+            if (locations == null || locations.getLocationsCount() == 0) {
+                LOG.error("failed to locate {}", chunkView.fileId);
                 // log here!
                 return 0;
             }