ConcurrentModification EHCache多线程Java

Question

我们有多个线程试图从EHCache获取，这有时会导致并发修改异常。我尝试过Retryable来解决这个问题，但它似乎没有做任何事情。有什么建议吗？

@Override
@Retryable(include= ConcurrentModificationException.class, backoff = @Backoff(delay = 5000, maxDelay = 3000), maxAttempts = 5)
public Object getFromCache(String cacheDomain, String cacheKey) {
    Object value = null;
    Cache cacheObject = getCacheObject();
    if (cacheObject != null) {
        StringBuilder fullCacheKey = new StringBuilder();
        fullCacheKey.append(cacheDomain);
        fullCacheKey.append("|");
        fullCacheKey.append(cacheKey);
        synchronized (cacheObject) {
            Element cacheElement = cacheObject.get(fullCacheKey.toString());
            if (cacheElement != null) {
                value = cacheElement.getObjectValue();
            }
        }
        log.debug("Value from Cache with key [" + fullCacheKey.toString() + "] is " + value);
    }
    return value;
}

Answer 1

为了防止这个错误，我在方法中做了一个深入的复制。这会有什么不可预见的后果吗？这个方法只会从缓存中得到，所以我相信不会有任何影响。

SerializationUtils.clone(cacheObject.get(fullCacheKey.toString()));

元素cacheElement = ( Element )