ClassNotFoundException in CacheJdbcStoreExample run on cluster - ignite

Question

I have a cluster with 2 nodes. Then I tried to run the CacheJdbcStoreExample in apache-ignite-fabric-2.1.0-bin/examples.But I got following exception:
visor> [06:51:41,113][SEVERE][tcp-disco-msg-worker-#13%null%][TcpDiscoverySpi] Failed to unmarshal discovery custom message.
class org.apache.ignite.IgniteCheckedException: Failed to find class with given class loader for unmarshalling (make sure same versions of all classes are available on all nodes or enable pee
r-class-loading) [clsLdr=sun.misc.Launcher$AppClassLoader#4aa4ceeb, cls=org.apache.ignite.examples.datagrid.store.jdbc.CacheJdbcStoreExample$1] at org.apache.ignite.marshaller.jdk.JdkMarshaller.unmarshal0(JdkMarshaller.java:124)
at org.apache.ignite.marshaller.AbstractNodeNameAwareMarshaller.unmarshal(AbstractNodeNameAwareMarshaller.java:94)
at org.apache.ignite.marshaller.jdk.JdkMarshaller.unmarshal0(JdkMarshaller.java:143)
at org.apache.ignite.marshaller.AbstractNodeNameAwareMarshaller.unmarshal(AbstractNodeNameAwareMarshaller.java:82)
at org.apache.ignite.internal.util.IgniteUtils.unmarshal(IgniteUtils.java:9733)
at org.apache.ignite.spi.discovery.tcp.messages.TcpDiscoveryCustomEventMessage.message(TcpDiscoveryCustomEventMessage.java:81)
at org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.notifyDiscoveryListener(ServerImpl.java:5436)
at org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.processCustomMessage(ServerImpl.java:5321)
at org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.processMessage(ServerImpl.java:2629)
at org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.processMessage(ServerImpl.java:2420)
at org.apache.ignite.spi.discovery.tcp.ServerImpl$MessageWorkerAdapter.body(ServerImpl.java:6576)
at org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.body(ServerImpl.java:2506)
at org.apache.ignite.spi.IgniteSpiThread.run(IgniteSpiThread.java:62)
Caused by: java.lang.ClassNotFoundException: org.apache.ignite.examples.datagrid.store.jdbc.CacheJdbcStoreExample$1
at java.net.URLClassLoader$1.run(URLClassLoader.java:359)
at java.net.URLClassLoader$1.run(URLClassLoader.java:348)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:278)
at org.apache.ignite.internal.util.IgniteUtils.forName(IgniteUtils.java:8465)
at org.apache.ignite.marshaller.jdk.JdkMarshallerObjectInputStream.resolveClass(JdkMarshallerObjectInputStream.java:54)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1817)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1711)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1982)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1533)
at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1917)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1527)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2227)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2151)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2009)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1533)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2227)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2151)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2009)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1533)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:420)
at java.util.ArrayList.readObject(ArrayList.java:771)
at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2118)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2009)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1533)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2227)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2151)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2009)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1533)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2227)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2151)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2009)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1533)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:420)
at org.apache.ignite.marshaller.jdk.JdkMarshaller.unmarshal0(JdkMarshaller.java:121)
... 12 more
I decompiled CacheJdbcStoreExample$1.class and got following code:
CacheJdbcStoreExample$1
package org.apache.ignite.examples.datagrid.store.jdbc;
import javax.cache.configuration.Factory;
import org.apache.ignite.cache.store.CacheStoreSessionListener;
import org.apache.ignite.cache.store.jdbc.CacheJdbcStoreSessionListener;
import org.h2.jdbcx.JdbcConnectionPool;
class CacheJdbcStoreExample$1
implements Factory<CacheStoreSessionListener>
{
public CacheStoreSessionListener create()
{
CacheJdbcStoreSessionListener lsnr = new CacheJdbcStoreSessionListener();
lsnr.setDataSource(JdbcConnectionPool.create("jdbc:h2:tcp://localhost/mem:ExampleDb", "sa", ""));
return lsnr;
}
}
SO I think there is something wrong at row 90 in CacheJdbcStoreExample source code:
// Configure JDBC session listener.
cacheCfg.setCacheStoreSessionListenerFactories(new Factory<CacheStoreSessionListener>() {
#Override public CacheStoreSessionListener create() {
CacheJdbcStoreSessionListener lsnr = new CacheJdbcStoreSessionListener();
lsnr.setDataSource(JdbcConnectionPool.create("jdbc:h2:tcp://localhost/mem:ExampleDb", "sa", ""));
return lsnr;
}
});
If I run the example on only one node not a cluster, it's OK.
What should I do to fix it?

Answer 1

The problem is that you configured a cache with a factory of CacheStoreSessionListener-s, but this factory is not visible from other nodes as they don't have it in their classpath.
You should start additional remote nodes with org.apache.ignite.examples.ExampleNodeStartup class from examples module or add examples module to the classpath of other nodes.