Cache entrySet EqualsFilter ClassNotFoundException

Question

Hello,
While using namedCache.entrySet(new EqualsFilter("attributeAccessor", value), null) I get a ClassNotFoundException.
Notes:_
- I have created my cache with the ClassLoader of the class I am trying to find instances for.
- Able to namedCache.put() with no issues
- Able to deserialize the same container object when I use namedCache.get()
- Tried both single and multiple attributeAccessor navigations: attr1 and attr1.attr2
- In the case of attr1 I get the ClassNotFoundException for the container object
- In the case of attr1.attr2 I get the ClassNotFoundException for the contained object
- I use a fluent API, which means my getters don't start with "get"; thus, attribute1 is accessed with method attribute1()
- I have attempted to create getAttribute1() and getAttribute2() methods with "getAttribute1.getAttribute2" just in case
- It is only a problem when using entrySet() with a Filter
Stack trace:_
(Wrapped: Failed request execution for DistributedCache service on Member(Id=1, Timestamp=2011-04-13 15:34:03.656, Address=XXX:8088, MachineId=61697, Location=machine:MACHNAME,process:3508, Role=CoherenceServer)) java.io.IOException: readObject failed: java.lang.ClassNotFoundException: packagename.ContainedClassName
     at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:247)
     at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:604)
     at com.tangosol.io.ResolvingObjectInputStream.resolveClass(ResolvingObjectInputStream.java:68)
     at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
     at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
     at com.tangosol.util.ExternalizableHelper.readSerializable(ExternalizableHelper.java:2180)
     at com.tangosol.util.ExternalizableHelper.readObjectInternal(ExternalizableHelper.java:2311)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2254)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2233)
     at com.tangosol.util.filter.ComparisonFilter.readExternal(ComparisonFilter.java:204)
     at com.tangosol.util.ExternalizableHelper.readExternalizableLite(ExternalizableHelper.java:2004)
     at com.tangosol.util.ExternalizableHelper.readObjectInternal(ExternalizableHelper.java:2308)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2254)
     at com.tangosol.io.DefaultSerializer.deserialize(DefaultSerializer.java:74)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.readObject(Service.CDB:1)
     at com.tangosol.coherence.component.net.Message.readObject(Message.CDB:1)
     at com.tangosol.coherence.component.net.message.requestMessage.distributedCacheRequest.partialRequest.FilterRequest.read(FilterRequest.CDB:7)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$QueryRequest.read(PartitionedCache.CDB:1)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.deserializeMessage(Grid.CDB:42)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onNotify(Grid.CDB:31)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.PartitionedService.onNotify(PartitionedService.CDB:3)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onNotify(PartitionedCache.CDB:3)
     at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     at java.lang.Thread.run(Thread.java:619)
ClassLoader: null
     at com.tangosol.util.Base.ensureRuntimeException(Base.java:293)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.tagException(Grid.CDB:36)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onQueryRequest(PartitionedCache.CDB:72)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$QueryRequest.run(PartitionedCache.CDB:1)
     at com.tangosol.coherence.component.net.message.requestMessage.DistributedCacheRequest.onReceived(DistributedCacheRequest.CDB:12)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onMessage(Grid.CDB:11)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onNotify(Grid.CDB:33)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.PartitionedService.onNotify(PartitionedService.CDB:3)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onNotify(PartitionedCache.CDB:3)
     at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: readObject failed: java.lang.ClassNotFoundException: packagename.ContainedClassName
     at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:247)
     at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:604)
     at com.tangosol.io.ResolvingObjectInputStream.resolveClass(ResolvingObjectInputStream.java:68)
     at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
     at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
     at com.tangosol.util.ExternalizableHelper.readSerializable(ExternalizableHelper.java:2180)
     at com.tangosol.util.ExternalizableHelper.readObjectInternal(ExternalizableHelper.java:2311)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2254)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2233)
     at com.tangosol.util.filter.ComparisonFilter.readExternal(ComparisonFilter.java:204)
     at com.tangosol.util.ExternalizableHelper.readExternalizableLite(ExternalizableHelper.java:2004)
     at com.tangosol.util.ExternalizableHelper.readObjectInternal(ExternalizableHelper.java:2308)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2254)
     at com.tangosol.io.DefaultSerializer.deserialize(DefaultSerializer.java:74)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.readObject(Service.CDB:1)
     at com.tangosol.coherence.component.net.Message.readObject(Message.CDB:1)
     at com.tangosol.coherence.component.net.message.requestMessage.distributedCacheRequest.partialRequest.FilterRequest.read(FilterRequest.CDB:7)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$QueryRequest.read(PartitionedCache.CDB:1)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.deserializeMessage(Grid.CDB:42)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onNotify(Grid.CDB:31)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.PartitionedService.onNotify(PartitionedService.CDB:3)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onNotify(PartitionedCache.CDB:3)
     at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     at java.lang.Thread.run(Thread.java:619)
ClassLoader: null
     at com.tangosol.util.ExternalizableHelper.readSerializable(ExternalizableHelper.java:2188)
     at com.tangosol.util.ExternalizableHelper.readObjectInternal(ExternalizableHelper.java:2311)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2254)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2233)
     at com.tangosol.util.filter.ComparisonFilter.readExternal(ComparisonFilter.java:204)
     at com.tangosol.util.ExternalizableHelper.readExternalizableLite(ExternalizableHelper.java:2004)
     at com.tangosol.util.ExternalizableHelper.readObjectInternal(ExternalizableHelper.java:2308)
     at com.tangosol.util.ExternalizableHelper.readObject(ExternalizableHelper.java:2254)
     at com.tangosol.io.DefaultSerializer.deserialize(DefaultSerializer.java:74)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.readObject(Service.CDB:1)
     at com.tangosol.coherence.component.net.Message.readObject(Message.CDB:1)
     at com.tangosol.coherence.component.net.message.requestMessage.distributedCacheRequest.partialRequest.FilterRequest.read(FilterRequest.CDB:7)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$QueryRequest.read(PartitionedCache.CDB:1)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.deserializeMessage(Grid.CDB:42)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onNotify(Grid.CDB:31)
     ... 4 more
Thanks for your help!
Kind regards,
Vaughn

Answer 1

I am using out-of-the-box configuration. I have not changed a thing about it. I have whittled down the code into a sandbox with unit test. I am using default Java serialization. The point was to get the simplest thing working.
In the code below, see CoherenceProductRepository#allProductsOfTenant(). If you comment out the statement with EqualsFilter and uncomment the other statement, the test works. If you use EqualsFilter it throws ClassNotFoundException.
The code is wired a bit differently than the actual code because I have removed a bunch of dependencies. Still it produces the same error.
Vaughn
Product.java
==========
package sandbox;
import java.io.Serializable;
public class Product implements Serializable {
private static final long serialVersionUID = 1L;
private String description;
private String name;
private Tenant tenant;
public Product(Tenant aTenant, String aName, String aDescription) {
this();
this.setDescription(aDescription);
this.setName(aName);
this.setTenant(aTenant);
this.initialize();
public void rename(String aName) {
this.setName(aName);
public String description() {
return this.description;
public String name() {
return this.name;
public Tenant tenant() {
return this.tenant;
@Override
public boolean equals(Object anObject) {
boolean equalObjects = false;
if (anObject != null && this.getClass() == anObject.getClass()) {
Product typedObject = (Product) anObject;
equalObjects =
this.name().equals(typedObject.name()) &&
this.description().equals(typedObject.description());
return equalObjects;
@Override
public int hashCode() {
int hashCodeValue =
+ (169853 * 229)
+ this.name().hashCode()
+ this.description().hashCode();
return hashCodeValue;
@Override
public String toString() {
return
"Product"
+ " description = " + this.description()
+ " name = " + this.name();
protected Product() {
super();
protected void setDescription(String aDescription) {
if (aDescription == null || aDescription.length() == 0) {
throw new IllegalArgumentException("Description is required.");
if (aDescription.length() > 500) {
throw new IllegalArgumentException("Description must be 500 characters or less.");
this.description = aDescription;
protected void setName(String aName) {
if (aName == null || aName.length() == 0) {
throw new IllegalArgumentException("Name is required.");
if (aName.length() > 100) {
throw new IllegalArgumentException("Name must be 100 characters or less.");
this.name = aName;
protected void setTenant(Tenant aTenant) {
if (aTenant == null) {
throw new IllegalArgumentException("The tenant is required.");
this.tenant = aTenant;
private void initialize() {
// begin-user-code: initialize()
// end-user-code: initialize()
Tenant.java
=========
package sandbox;
import java.io.Serializable;
public class Tenant implements Serializable {
private static final long serialVersionUID = 1L;
private String id;
public Tenant(String anId) {
super();
this.setId(anId);
this.initialize();
public Tenant(Tenant aTenant) {
this(aTenant.id());
public String id() {
return this.id;
@Override
public boolean equals(Object anObject) {
boolean equalObjects = false;
if (anObject != null && this.getClass() == anObject.getClass()) {
Tenant typedObject = (Tenant) anObject;
equalObjects =
this.id().equals(typedObject.id());
return equalObjects;
@Override
public int hashCode() {
int hashCodeValue =
+ (175819 * 311)
+ this.id().hashCode();
return hashCodeValue;
@Override
public String toString() {
return
"Tenant"
+ " id = " + this.id();
protected Tenant() {
super();
private void initialize() {
// begin-user-code: initialize()
// end-user-code: initialize()
private void setId(String anId) {
if (anId == null || anId.length() == 0) {
throw new IllegalArgumentException("The tenant identity is required.");
if (anId.length() > 36) {
throw new IllegalArgumentException("The tenant identity must be 36 characters or less.");
this.id = anId;
CoherenceProductRepository.java
======================
package sandbox;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import com.tangosol.net.CacheFactory;
import com.tangosol.net.NamedCache;
import com.tangosol.util.filter.EqualsFilter;
public class CoherenceProductRepository {
public CoherenceProductRepository() {
super();
public void add(Product aProduct) {
this.cache().put(this.idOf(aProduct), aProduct);
public void addAll(Collection<Product> aProductCollection) {
if (!aProductCollection.isEmpty()) {
Map<String,Product> productsMap =
new HashMap<String,Product>(aProductCollection.size());
for (Product product : aProductCollection) {
productsMap.put(this.idOf(product), product);
this.cache().putAll(productsMap);
@SuppressWarnings("unchecked")
public Collection<Product> allProductsOfTenant(Tenant aTenant) {
Set<Map.Entry<String, Product>> entries =
this.cache().entrySet(new EqualsFilter("tenant.id", aTenant.id()), null);
// Set<Map.Entry<String, Product>> entries =
// this.cache().entrySet();
Collection<Product> products =
new HashSet<Product>(entries.size());
for (Map.Entry<String, Product> entry : entries) {
products.add(entry.getValue());
return products;
public Product productOfName(String aName) {
return (Product) this.cache().get(aName);
public void remove(Product aProduct) {
this.cache().remove(this.idOf(aProduct));
public void removeAll(Collection<Product> aProductCollection) {
for (Product product : aProductCollection) {
this.remove(product);
private NamedCache cache() {
NamedCache cache = CacheFactory.getCache("coherence.sandbox.product");
return cache;
private String idOf(Product aProduct) {
return aProduct.name();
CoherenceProductRepositoryTest.java
========================
package sandbox;
import junit.framework.TestCase;
import java.util.Arrays;
import java.util.Collection;
public class CoherenceProductRepositoryTest extends TestCase {
private CoherenceProductRepository productRepository;
private Tenant tenant;
public CoherenceProductRepositoryTest() {
super();
public void testSaveProduct() throws Exception {
Tenant tenant = new Tenant("01234567");
Product product =
new Product(
tenant,
"My Product",
"This is the description of my product.");
this.productRepository().add(product);
Product readProduct =
this.productRepository().productOfName(product.name());
assertNotNull(readProduct);
assertEquals(readProduct.tenant(), tenant);
assertEquals(readProduct.name(), product.name());
assertEquals(readProduct.description(), product.description());
public void testFindMultipleProducts() throws Exception {
Product product1 =
new Product(
tenant,
"My Product 1",
"This is the description of my first product.");
Product product2 =
new Product(
tenant,
"My Product 2",
"This is the description of my second product.");
Product product3 =
new Product(
tenant,
"My Product 3",
"This is the description of my third product.");
this.productRepository().addAll( Arrays.asList(product1, product2, product3) );
assertNotNull(this.productRepository().productOfName(product1.name()));
assertNotNull(this.productRepository().productOfName(product2.name()));
assertNotNull(this.productRepository().productOfName(product3.name()));
Collection<Product> allProducts =
this.productRepository().allProductsOfTenant(tenant);
assertEquals(allProducts.size(), 3);
@Override
protected void setUp() throws Exception {
this.setProductRepository(new CoherenceProductRepository());
this.tenant = new Tenant("01234567");
super.setUp();
@Override
protected void tearDown() throws Exception {
Collection<Product> products =
this.productRepository().allProductsOfTenant(tenant);
this.productRepository().removeAll(products);
protected CoherenceProductRepository productRepository() {
return this.productRepository;
protected void setProductRepository(CoherenceProductRepository aProductRepository) {
this.productRepository = aProductRepository;
}