我正在玩弄一个基本的无限泛集群，我遇到了一个令人费解的错误。

我基本上实现了一个共享映射，只包含一个整数

这是我的服务代码

package sandbox.infinispan.test.service;

import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import javax.inject.Named;

import org.infinispan.Cache;

@Named("useThisOne")
@ApplicationScoped
public class CounterService implements ICounterService {

    private static final String KEY = "key";

    @Inject
    private Cache<String, Integer> cache;

    @Override
    public void inc(final int amount) {
        this.cache.put(KEY, Integer.valueOf(this.get() + amount));
    }

    @Override
    public int get() {
        return this.cache.computeIfAbsent(KEY, k -> Integer.valueOf(0)).intValue();
    }
}

缓存是通过以下方式生成的：

package sandbox.infinispan.test.config;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.context.Dependent;
import javax.enterprise.inject.Produces;

import org.infinispan.configuration.cache.CacheMode;
import org.infinispan.configuration.cache.Configuration;
import org.infinispan.configuration.cache.ConfigurationBuilder;
import org.infinispan.configuration.global.GlobalConfiguration;
import org.infinispan.configuration.global.GlobalConfigurationBuilder;
import org.infinispan.manager.DefaultCacheManager;
import org.infinispan.manager.EmbeddedCacheManager;

@Dependent
class CacheProvider {

    @Produces
    @ApplicationScoped
    private EmbeddedCacheManager defaultClusteredCacheManager() {
        final GlobalConfiguration g = new GlobalConfigurationBuilder() //
                .clusteredDefault() //
                .transport() //
                .nodeName(this.getNodeName()) //
                .clusterName("infinispanTestCluster") //
                .build();
        final Configuration cfg = new ConfigurationBuilder() //
                .clustering() //
                .cacheMode(CacheMode.REPL_SYNC) ///
                .build();
        return new DefaultCacheManager(g, cfg);
    }
}

当集群中至少有两台服务器时，computeIfAbsen会失败

15:48:50,253 ERROR [org.infinispan.interceptors.impl.InvocationContextInterceptor] (jgroups-7,myhostname-14393) ISPN000136: Error executing command ComputeIfAbsentCommand, writing keys [key]: org.infinispan.remoting.RemoteException: ISPN000217: Received exception from otherhostname-44445, see cause for remote stack trace

这可以归结为：

Caused by: java.lang.NoSuchMethodException: sandbox.infinispan.test.service.CounterService.$deserializeLambda$(java.lang.invoke.SerializedLambda)

最后是：

Caused by: java.lang.IllegalArgumentException: Invalid lambda deserialization
        at sandbox.infinispan.test.service.CounterService.$deserializeLambda$(CounterService.java:10)
            ... 68 more
Caused by: an exception which occurred:
        in object of type java.lang.invoke.SerializedLambda

如果我把我非常好的时髦代码重写成丑陋的代码，它就会起作用。

@Override
public int get() {
    Integer value = this.cache.get(KEY);
    if (value == null) {
        value = Integer.valueOf(0);
        this.cache.put(KEY, value);
    }
    return value.intValue();
}

我怎么能使用漂亮的电脑现在没有做事的方式？

Eclipse 2018-12、WildFly 14、集群dev成员上的java 10、远程集群成员上的CentO 7、OpenJdk 10、WildFly 14。

谢谢你的帮忙

已解决（有点）

由于我在这里得到的帮助，我将lambda转换为内部类：

static class OhWell implements Serializable {

    static Integer zero(final String t) {
        return Integer.valueOf(0);
    }
}

@Override
public int get() {
    return this.cache.computeIfAbsent(KEY, OhWell::zero).intValue();
}

它现在可以用了，但比干净的lambda要差得多。所以我会坚持传统的方式，除非有人能想出更好的方式。

进一步结果：

下面的静态内部类使用静态方法工作

static class StaticOhWell implements Serializable {

    static Integer apply(final String t) {
        return Integer.valueOf(0);
    }
}

@Override
public int get() {
    return this.cache.computeIfAbsent(KEY, StaticOhWell::apply).intValue();
}

以下具有非静态方法的非静态内部类失败：

class NotStaticOhWell implements SerializableFunction<String, Integer> {

    @Override
    public Integer apply(final String t) {
            return Integer.valueOf(0);
    }
}

@Override
public int get() {
    return this.cache.computeIfAbsent(KEY, new NotStaticOhWell()::apply).intValue();
}

它失败了，错误消息NotSerializableException：org.infinispan.cache.impl.EncoderCache：

13:41:29,221 ERROR [org.infinispan.interceptors.impl.InvocationContextInterceptor] (default task-1) ISPN000136: Error executing command ComputeIfAbsentCommand, writing keys [value]: org.infinispan.commons.marshall.NotSerializableException: org.infinispan.cache.impl.EncoderCache
    Caused by: an exception which occurred:
    in field sandbox.infinispan.test.service.CounterService.cache
    in object sandbox.infinispan.test.service.CounterService@4612a6c3
    in field sandbox.infinispan.test.service.CounterService$NotStaticOhWell.this$0
    in object sandbox.infinispan.test.service.CounterService$NotStaticOhWell@4effd362
    in field java.lang.invoke.SerializedLambda.capturedArgs
    in object java.lang.invoke.SerializedLambda@e62f08a
    in object sandbox.infinispan.test.service.CounterService$$Lambda$1195/1060417313@174a143b

最后一句话

使用“静态lambda”（实现SerializableFunction接口的静态内部类）也可以

static class StaticSerializableFunction implements SerializableFunction<String, Integer> {

    @Override
    public Integer apply(final String t) {
        return Integer.valueOf(0);
    }
}

@Override
public int get() {
    return this.cache.computeIfAbsent(KEY, new StaticSerializableFunction()::apply).intValue();
}

获胜者是...

通过“转换”缓存使类实际上可序列化，只需使用此类的方法即可。无需创建内部类！

package sandbox.infinispan.test.service;

import java.io.Serializable;

import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import javax.inject.Named;

import org.infinispan.Cache;

@Named("useThisOne")
@ApplicationScoped
public class CounterService implements ICounterService, Serializable {

    private static final String KEY = "value";

    @SuppressWarnings("cdi-ambiguous-dependency")
    @Inject
    private transient Cache<String, Integer> cache;

    @Override
    public void inc(final int amount) {
        this.cache.put(KEY, Integer.valueOf(this.get() + amount));
    }

    @Override
    public int get() {
        return this.cache.computeIfAbsent(KEY, this::zero).intValue();
    }

    private Integer zero(@SuppressWarnings("unused") final String unused) {
        return Integer.valueOf(0);
    }

    @Override
    public void reset() {
        this.cache.clear();
    }
}

谢谢大家！