Merge branch 'main' into eef

Author: rahul2393

.github/workflows/unmanaged_dependency_check.yaml

@@ -17,6 +17,6 @@ jobs:
           # repository
           .kokoro/build.sh
       - name: Unmanaged dependency check
-        uses: googleapis/sdk-platform-java/java-shared-dependencies/unmanaged-dependency-check@google-cloud-shared-dependencies/v3.56.0
+        uses: googleapis/sdk-platform-java/java-shared-dependencies/unmanaged-dependency-check@google-cloud-shared-dependencies/v3.56.1
         with:
           bom-path: google-cloud-spanner-bom/pom.xml

google-cloud-spanner-bom/pom.xml

@@ -8,7 +8,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>sdk-platform-java-config</artifactId>
-    <version>3.56.0</version>
+    <version>3.56.1</version>
   </parent>
 
   <name>Google Cloud Spanner BOM</name>

google-cloud-spanner/src/main/java/com/google/cloud/spanner/MultiplexedSessionDatabaseClient.java

@@ -562,7 +562,7 @@ final class MultiplexedSessionMaintainer {
       this.clock = clock;
     }
 
-    void start() {
+    private synchronized void start() {
       // Schedule the maintainer to run once every ten minutes (by default).
       long loopFrequencyMillis =
           MultiplexedSessionDatabaseClient.this
@@ -577,7 +577,7 @@ void start() {
               this::maintain, loopFrequencyMillis, loopFrequencyMillis, TimeUnit.MILLISECONDS);
     }
 
-    void stop() {
+    private synchronized void stop() {
       if (this.scheduledFuture != null) {
         this.scheduledFuture.cancel(false);
       }

pom.xml

@@ -14,7 +14,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>sdk-platform-java-config</artifactId>
-    <version>3.56.0</version>
+    <version>3.56.1</version>
   </parent>
 
   <developers>