[iotdb] branch master updated: fix a sonar bug (#1897)

[haonan]

This is an automated email from the ASF dual-hosted git repository.

haonan pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/iotdb.git


The following commit(s) were added to refs/heads/master by this push:
     new 654662f  fix a sonar bug (#1897)
654662f is described below

commit 654662f8ad9ef3d6daab16804851d4c867352e1a
Author: Haonan <hhao...@outlook.com>
AuthorDate: Thu Oct 29 11:57:46 2020 +0800

    fix a sonar bug (#1897)
---
 .../java/org/apache/iotdb/db/query/reader/series/SeriesReader.java   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git 
a/server/src/main/java/org/apache/iotdb/db/query/reader/series/SeriesReader.java
 
b/server/src/main/java/org/apache/iotdb/db/query/reader/series/SeriesReader.java
index d65cec4..e0618ff 100644
--- 
a/server/src/main/java/org/apache/iotdb/db/query/reader/series/SeriesReader.java
+++ 
b/server/src/main/java/org/apache/iotdb/db/query/reader/series/SeriesReader.java
@@ -428,7 +428,10 @@ public class SeriesReader {
   }
 
   private boolean firstPageOverlapped() {
-    return firstPageReader != null && (!seqPageReaders.isEmpty() && orderUtils
+    if (firstPageReader == null) {
+      return false;
+    }
+    return (!seqPageReaders.isEmpty() && orderUtils
         .isOverlapped(firstPageReader.getStatistics(), 
seqPageReaders.get(0).getStatistics())) || (
         !unSeqPageReaders.isEmpty() && 
orderUtils.isOverlapped(firstPageReader.getStatistics(),
             unSeqPageReaders.peek().getStatistics()));