GitHub user asjfoajs closed a discussion: grpc拉取消息时返回空指针异常
grpc拉取时返回CODE: INTERNAL_SERVER_ERROR, MESSAGE: null. NullPointerException.
org.apache.rocketmq.proxy.grpc.v2.consumer.ReceiveMessageActivity.receiveMessage(ReceiveMessageActivity.java:66)
查看ReceiveMessageActivity.java:66代码
Settings settings = this.grpcClientSettingsManager.getClientSettings(ctx);
Subscription subscription = settings.getSubscription();
查看getClientSettings方法
public Settings getClientSettings(ProxyContext ctx) {
String clientId = ctx.getClientID();
Settings settings = getRawClientSettings(clientId);
if (settings == null) {
return null;
}
if (settings.hasPublishing()) {
settings = mergeProducerData(settings);
} else if (settings.hasSubscription()) {
settings = mergeSubscriptionData(ctx, settings,
settings.getSubscription().getGroup().getName());
}
return mergeMetric(settings);
}
感觉应该是 getClientSettings返回空导致
settings.getSubscription();调用时出现空指针异常，虽然对这段代码加入了try-catch，但是在调用settings.getSubscription();之前，先判断一下settings是否为空，如果为空打印一些日志直接返回，不进行后续操作会比较好一点呢？
GitHub link: https://github.com/apache/rocketmq/discussions/8019
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