diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/GetApplicationsRequestPBImpl.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/GetApplicationsRequestPBImpl.java
index a6abb99b43..4c5fee0e7f 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/GetApplicationsRequestPBImpl.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/GetApplicationsRequestPBImpl.java
@@ -65,7 +65,7 @@ public GetApplicationsRequestPBImpl(GetApplicationsRequestProto proto) {
     viaProto = true;
   }
 
-  public GetApplicationsRequestProto getProto() {
+  public synchronized GetApplicationsRequestProto getProto() {
     mergeLocalToProto();
     proto = viaProto ? proto : builder.build();
     viaProto = true;
@@ -175,13 +175,13 @@ private void initQueues() {
   }
 
   @Override
-  public Set<String> getApplicationTypes() {
+  public synchronized Set<String> getApplicationTypes() {
     initApplicationTypes();
     return this.applicationTypes;
   }
 
   @Override
-  public void setApplicationTypes(Set<String> applicationTypes) {
+  public synchronized void setApplicationTypes(Set<String> applicationTypes) {
     maybeInitBuilder();
     if (applicationTypes == null)
       builder.clearApplicationTypes();
@@ -198,13 +198,13 @@ private void initApplicationTags() {
   }
 
   @Override
-  public Set<String> getApplicationTags() {
+  public synchronized Set<String> getApplicationTags() {
     initApplicationTags();
     return this.applicationTags;
   }
 
   @Override
-  public void setApplicationTags(Set<String> tags) {
+  public synchronized void setApplicationTags(Set<String> tags) {
     maybeInitBuilder();
     if (tags == null || tags.isEmpty()) {
       builder.clearApplicationTags();
@@ -219,7 +219,7 @@ public void setApplicationTags(Set<String> tags) {
   }
 
   @Override
-  public EnumSet<YarnApplicationState> getApplicationStates() {
+  public synchronized EnumSet<YarnApplicationState> getApplicationStates() {
     initApplicationStates();
     return this.applicationStates;
   }
@@ -233,12 +233,12 @@ private void initScope() {
   }
 
   @Override
-  public ApplicationsRequestScope getScope() {
+  public synchronized ApplicationsRequestScope getScope() {
     initScope();
     return this.scope;
   }
 
-  public void setScope(ApplicationsRequestScope scope) {
+  public synchronized void setScope(ApplicationsRequestScope scope) {
     maybeInitBuilder();
     if (scope == null) {
       builder.clearScope();
@@ -247,7 +247,7 @@ public void setScope(ApplicationsRequestScope scope) {
   }
 
   @Override
-  public void setApplicationStates(EnumSet<YarnApplicationState> applicationStates) {
+  public synchronized void setApplicationStates(EnumSet<YarnApplicationState> applicationStates) {
     maybeInitBuilder();
     if (applicationStates == null) {
       builder.clearApplicationStates();
@@ -256,7 +256,7 @@ public void setApplicationStates(EnumSet<YarnApplicationState> applicationStates
   }
 
   @Override
-  public void setApplicationStates(Set<String> applicationStates) {
+  public synchronized void setApplicationStates(Set<String> applicationStates) {
     EnumSet<YarnApplicationState> appStates = null;
     for (YarnApplicationState state : YarnApplicationState.values()) {
       if (applicationStates.contains(
@@ -272,12 +272,12 @@ public void setApplicationStates(Set<String> applicationStates) {
   }
 
   @Override
-  public Set<String> getUsers() {
+  public synchronized Set<String> getUsers() {
     initUsers();
     return this.users;
   }
 
-  public void setUsers(Set<String> users) {
+  public synchronized void setUsers(Set<String> users) {
     maybeInitBuilder();
     if (users == null) {
       builder.clearUsers();
@@ -286,13 +286,13 @@ public void setUsers(Set<String> users) {
   }
 
   @Override
-  public Set<String> getQueues() {
+  public synchronized Set<String> getQueues() {
     initQueues();
     return this.queues;
   }
 
   @Override
-  public void setQueues(Set<String> queues) {
+  public synchronized void setQueues(Set<String> queues) {
     maybeInitBuilder();
     if (queues == null) {
       builder.clearQueues();
@@ -301,7 +301,7 @@ public void setQueues(Set<String> queues) {
   }
 
   @Override
-  public long getLimit() {
+  public synchronized long getLimit() {
     if (this.limit == Long.MAX_VALUE) {
       GetApplicationsRequestProtoOrBuilder p = viaProto ? proto : builder;
       this.limit = p.hasLimit() ? p.getLimit() : Long.MAX_VALUE;
@@ -310,13 +310,13 @@ public long getLimit() {
   }
 
   @Override
-  public void setLimit(long limit) {
+  public synchronized void setLimit(long limit) {
     maybeInitBuilder();
     this.limit = limit;
   }
 
   @Override
-  public Range<Long> getStartRange() {
+  public synchronized Range<Long> getStartRange() {
     if (this.start == null) {
       GetApplicationsRequestProtoOrBuilder p = viaProto ? proto: builder;
       if (p.hasStartBegin() || p.hasStartEnd()) {
@@ -329,12 +329,12 @@ public Range<Long> getStartRange() {
   }
 
   @Override
-  public void setStartRange(Range<Long> range) {
+  public synchronized void setStartRange(Range<Long> range) {
     this.start = range;
   }
 
   @Override
-  public void setStartRange(long begin, long end)
+  public synchronized void setStartRange(long begin, long end)
       throws IllegalArgumentException {
     if (begin > end) {
       throw new IllegalArgumentException("begin > end in range (begin, " +
@@ -344,7 +344,7 @@ public void setStartRange(long begin, long end)
   }
 
   @Override
-  public Range<Long> getFinishRange() {
+  public synchronized Range<Long> getFinishRange() {
     if (this.finish == null) {
       GetApplicationsRequestProtoOrBuilder p = viaProto ? proto: builder;
       if (p.hasFinishBegin() || p.hasFinishEnd()) {
@@ -357,12 +357,12 @@ public Range<Long> getFinishRange() {
   }
 
   @Override
-  public void setFinishRange(Range<Long> range) {
+  public synchronized void setFinishRange(Range<Long> range) {
     this.finish = range;
   }
 
   @Override
-  public void setFinishRange(long begin, long end) {
+  public synchronized void setFinishRange(long begin, long end) {
     if (begin > end) {
       throw new IllegalArgumentException("begin > end in range (begin, " +
           "end): (" + begin + ", " + end + ")");