diff --git a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFileBackedHTTPMetadataResolver.java b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFileBackedHTTPMetadataResolver.java
index d7d124a0a..9660950d7 100644
--- a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFileBackedHTTPMetadataResolver.java
+++ b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFileBackedHTTPMetadataResolver.java
@@ -15,6 +15,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
 import static edu.internet2.tier.shibboleth.admin.util.DurationUtility.toMillis;
@@ -83,6 +84,15 @@ protected void initMetadataResolver() throws ComponentInitializationException {
                                                        indexWriter);
     }
 
+    @Nonnull
+    @Override
+    protected BatchEntityBackingStore getBackingStore() {
+        if (super.getBackingStore() == null) {
+            super.setBackingStore(super.createNewBackingStore());
+        }
+        return super.getBackingStore();
+    }
+
     /**
      * {@inheritDoc}
      */
diff --git a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFilesystemMetadataResolver.java b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFilesystemMetadataResolver.java
index 8da204c3e..cfd3bdf2c 100644
--- a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFilesystemMetadataResolver.java
+++ b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFilesystemMetadataResolver.java
@@ -11,6 +11,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import java.io.File;
 
@@ -51,15 +52,31 @@ public DateTime getLastRefresh() {
 
     @Override
     protected void initMetadataResolver() throws ComponentInitializationException {
+        //Necessary to make sure backing store is initialized by the super class to avoid NPE during re-filtering
+        try {
+            setBackingStore(createNewBackingStore());
+        }
+        catch(Throwable e) {
+            logger.warn("Error caught and ignored during initialization necessary to init backingStore", e);
+        }
+
         if (this.sourceResolver.getDoInitialization()) {
             super.initMetadataResolver();
-
             delegate.addIndexedDescriptorsFromBackingStore(this.getBackingStore(),
                     this.sourceResolver.getResourceId(),
                     indexWriter);
         }
     }
 
+    @Nonnull
+    @Override
+    protected BatchEntityBackingStore getBackingStore() {
+        if (super.getBackingStore() == null) {
+            super.setBackingStore(super.createNewBackingStore());
+        }
+        return super.getBackingStore();
+    }
+
     /**
      * {@inheritDoc}
      */
diff --git a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlResourceBackedMetadataResolver.java b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlResourceBackedMetadataResolver.java
index 0a4b2a7f2..62bdb37d8 100644
--- a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlResourceBackedMetadataResolver.java
+++ b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlResourceBackedMetadataResolver.java
@@ -11,6 +11,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import java.io.IOException;
 
@@ -59,6 +60,15 @@ protected void initMetadataResolver() throws ComponentInitializationException {
                                                        indexWriter);
     }
 
+    @Nonnull
+    @Override
+    protected BatchEntityBackingStore getBackingStore() {
+        if (super.getBackingStore() == null) {
+            super.setBackingStore(super.createNewBackingStore());
+        }
+        return super.getBackingStore();
+    }
+
     /**
      * {@inheritDoc}
      */
diff --git a/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlFileBackedHTTPMetadataResolverTests.groovy b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlFileBackedHTTPMetadataResolverTests.groovy
new file mode 100644
index 000000000..2a7ef7f7b
--- /dev/null
+++ b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlFileBackedHTTPMetadataResolverTests.groovy
@@ -0,0 +1,27 @@
+package edu.internet2.tier.shibboleth.admin.ui.domain.resolvers
+
+import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.opensaml.OpenSamlFileBackedHTTPMetadataResolver
+import edu.internet2.tier.shibboleth.admin.ui.opensaml.OpenSamlObjects
+import edu.internet2.tier.shibboleth.admin.ui.service.TokenPlaceholderValueResolvingService
+import edu.internet2.tier.shibboleth.admin.util.TokenPlaceholderResolvers
+import org.springframework.core.env.MutablePropertySources
+import spock.lang.Specification
+
+class OpenSamlFileBackedHTTPMetadataResolverTests extends Specification {
+    def openSamlObjects = new OpenSamlObjects().with {
+        init()
+        it
+    }
+
+    def "test refresh"() {
+        when:
+        new TokenPlaceholderResolvers(TokenPlaceholderValueResolvingService.shibbolethPlaceholderPrefixAware(new MutablePropertySources()))
+        def fbhmr = new FileBackedHttpMetadataResolver(name: 'test', xmlId: 'test', metadataURL: 'http://testme', backingFile: 'metadata/testme.xml')
+
+        def x = new OpenSamlFileBackedHTTPMetadataResolver(openSamlObjects.parserPool, null, fbhmr)
+        x.refilter()
+
+        then:
+        noExceptionThrown()
+    }
+}
diff --git a/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlFilesystemMetadataResolverTests.groovy b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlFilesystemMetadataResolverTests.groovy
new file mode 100644
index 000000000..f6669b32a
--- /dev/null
+++ b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlFilesystemMetadataResolverTests.groovy
@@ -0,0 +1,22 @@
+package edu.internet2.tier.shibboleth.admin.ui.domain.resolvers
+
+import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.opensaml.OpenSamlFilesystemMetadataResolver
+import edu.internet2.tier.shibboleth.admin.ui.opensaml.OpenSamlObjects
+import spock.lang.Specification
+
+class OpenSamlFilesystemMetadataResolverTests extends Specification {
+    def openSamlObjects = new OpenSamlObjects().with {
+        init()
+        it
+    }
+
+    def "test refresh"() {
+        when:
+        def fsmr = new FilesystemMetadataResolver(name: 'test', xmlId: 'test', metadataFile: 'metadata/metadata.xml')
+        def x = new OpenSamlFilesystemMetadataResolver(openSamlObjects.parserPool, null, fsmr, new File(fsmr.metadataFile))
+        x.refilter()
+
+        then:
+        noExceptionThrown()
+    }
+}
diff --git a/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlResourceBackedMetadataResolverTests.groovy b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlResourceBackedMetadataResolverTests.groovy
new file mode 100644
index 000000000..28223b2f8
--- /dev/null
+++ b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/OpenSamlResourceBackedMetadataResolverTests.groovy
@@ -0,0 +1,24 @@
+package edu.internet2.tier.shibboleth.admin.ui.domain.resolvers
+
+import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.opensaml.OpenSamlResourceBackedMetadataResolver
+import edu.internet2.tier.shibboleth.admin.ui.opensaml.OpenSamlObjects
+import net.shibboleth.ext.spring.resource.ResourceHelper
+import org.springframework.core.io.ClassPathResource
+import spock.lang.Specification
+
+class OpenSamlResourceBackedMetadataResolverTests extends Specification {
+    def openSamlObjects = new OpenSamlObjects().with {
+        init()
+        it
+    }
+
+    def 'test refresh'() {
+        when:
+        def rbmr = new ResourceBackedMetadataResolver(name: 'test', xmlId: 'test', classpathMetadataResource: new ClasspathMetadataResource('metadata/metadata.xml'))
+        def x = new OpenSamlResourceBackedMetadataResolver(openSamlObjects.parserPool, null, rbmr, ResourceHelper.of(new ClassPathResource(rbmr.classpathMetadataResource.file)))
+        x.refilter()
+
+        then:
+        noExceptionThrown()
+    }
+}
diff --git a/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/service/JPAMetadataResolverServiceImplTests.groovy b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/service/JPAMetadataResolverServiceImplTests.groovy
index dd55874a0..73ace1205 100644
--- a/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/service/JPAMetadataResolverServiceImplTests.groovy
+++ b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/service/JPAMetadataResolverServiceImplTests.groovy
@@ -12,6 +12,7 @@ import edu.internet2.tier.shibboleth.admin.ui.domain.filters.MetadataFilter
 import edu.internet2.tier.shibboleth.admin.ui.domain.filters.RequiredValidUntilFilter
 import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.ClasspathMetadataResource
 import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.DynamicHttpMetadataResolver
+import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.FilesystemMetadataResolver
 import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.LocalDynamicMetadataResolver
 import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.MetadataQueryProtocolScheme
 import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.RegexScheme