Merge branch '1.8_release_3.10.x' into 1.8_release_4.0.x

Author: gituser

flinkx-test/pom.xml

@@ -12,7 +12,7 @@
     <artifactId>flinkx-test</artifactId>
 
     <properties>
-        <flink.version>1.8.3</flink.version>
+        <flink.version>1.8.1</flink.version>
         <prometheus.version>0.3.0</prometheus.version>
     </properties>
 

pom.xml

@@ -73,7 +73,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <scala.binary.version>2.10</scala.binary.version>
-        <flink.version>1.8.3</flink.version>
+        <flink.version>1.8.1</flink.version>
         <hadoop.version>2.7.3</hadoop.version>
         <http.version>4.5.3</http.version>
         <dev.path>${basedir}/dev</dev.path>