Fix issue elastic#51486

feifeiiiiiiiiiii · web-flow · commit 41b90b3e2af9 · 2020-02-01T20:07:10.000+08:00
diff --git a/server/src/main/java/org/elasticsearch/index/mapper/RootObjectMapper.java b/server/src/main/java/org/elasticsearch/index/mapper/RootObjectMapper.java
@@ -168,6 +168,9 @@ protected boolean processField(RootObjectMapper.Builder builder, String fieldNam
                       }
                   ]
                 */
+                if (!(fieldNode instanceof List)) {
+                    throw new MapperParsingException("Dynamic template syntax error");
+                }
                 List<?> tmplNodes = (List<?>) fieldNode;
                 List<DynamicTemplate> templates = new ArrayList<>();
                 for (Object tmplNode : tmplNodes) {

Original file line number	Diff line number	Diff line change
`@@ -168,6 +168,9 @@ protected boolean processField(RootObjectMapper.Builder builder, String fieldNam`
`168`	`168`	`}`
`169`	`169`	`]`
`170`	`170`	`*/`
	`171`	`+ if (!(fieldNode instanceof List)) {`
	`172`	`+ throw new MapperParsingException("Dynamic template syntax error");`
	`173`	`+ }`
`171`	`174`	`List<?> tmplNodes = (List<?>) fieldNode;`
`172`	`175`	`List<DynamicTemplate> templates = new ArrayList<>();`
`173`	`176`	`for (Object tmplNode : tmplNodes) {`