Fixing java.lang.IllegalStateException in FragmentMetadataVisitor.getTagNameToValueMap

.github/workflows/maven.yml

@@ -0,0 +1,35 @@
+# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Java CI with Maven
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: maven
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml
+
+    # Optional: Uploads the full dependency graph to GitHub to improve the quality of Dependabot alerts this repository can receive
+    - name: Update dependency graph
+      uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6

src/main/java/com/amazonaws/kinesisvideo/parser/utilities/FragmentMetadataVisitor.java

@@ -352,7 +352,7 @@ private Map<String, String> getTagNameToValueMap() {
         Map<Long, String> parentElementNumberToTagValue = tagElements.stream()
                 .filter(e -> MkvTypeInfos.TAGSTRING.equals(e.getElementMetaData().getTypeInfo()))
                 .filter(e -> MkvTypeInfos.SIMPLETAG.equals(getParentElement(e).getTypeInfo()))
-                .collect(Collectors.toMap(e -> getParentElement(e).getElementNumber(), this::getMkvElementStringVal));
+                .collect(Collectors.toMap(e -> getParentElement(e).getElementNumber(), this::getMkvElementStringVal, (a,b)->a));
         return tagNameToParentElementNumber.entrySet()
                 .stream()
                 .collect(Collectors.toMap(e -> e.getKey(),