前言
大家好，我是小郭，之前在Docker下安装了RocketMQ以及他的管理平台，但是管理平台在运维的时候只能满足我们部分的需求，所以为了在集群运维时能够的得心应手，研究了下mqadmin的使用，没想到一开始就遇到了报错，在这里和大家分享下解决的方法。
使用mqadmin的异常信息
[rocketmq@9721b06bb988 bin]$ mqadmin topicList -n 127.0.0.1:9876
RocketMQLog:WARN No appenders could be found for logger (io.netty.util.internal.PlatformDependent0).
RocketMQLog:WARN Please initialize the logger system properly.
org.apache.rocketmq.tools.command.SubCommandException: TopicListSubCommand command failed
at org.apache.rocketmq.tools.command.topic.TopicListSubCommand.execute(TopicListSubCommand.java:113)
at org.apache.rocketmq.tools.command.MQAdminStartup.main0(MQAdminStartup.java:139)
at org.apache.rocketmq.tools.command.MQAdminStartup.main(MQAdminStartup.java:90)
Caused by: org.apache.rocketmq.acl.common.AclException: [10015:signature-failed] unable to calculate a request signature. error=[10015:signature-failed] unable to calculate a request signature. error=Algorithm HmacSHA1 not available
at org.apache.rocketmq.acl.common.AclSigner.signAndBase64Encode(AclSigner.java:84)
at org.apache.rocketmq.acl.common.AclSigner.calSignature(AclSigner.java:73)
at org.apache.rocketmq.acl.common.AclSigner.calSignature(AclSigner.java:68)
at org.apache.rocketmq.acl.common.AclUtils.calSignature(AclUtils.java:69)
at org.apache.rocketmq.acl.common.AclClientRPCHook.doBeforeRequest(AclClientRPCHook.java:44)
at org.apache.rocketmq.remoting.netty.NettyRemotingAbstract.doBeforeRpcHooks(NettyRemotingAbstract.java:172)
at org.apache.rocketmq.remoting.netty.NettyRemotingClient.invokeSync(NettyRemotingClient.java:368)
at org.apache.rocketmq.client.impl.MQClientAPIImpl.getTopicListFromNameServer(MQClientAPIImpl.java:1398)
at org.apache.rocketmq.tools.admin.DefaultMQAdminExtImpl.fetchAllTopicList(DefaultMQAdminExtImpl.java:253)
at org.apache.rocketmq.tools.admin.DefaultMQAdminExt.fetchAllTopicList(DefaultMQAdminExt.java:218)
at org.apache.rocketmq.tools.command.topic.TopicListSubCommand.execute(TopicListSubCommand.java:107)
... 2 more
Caused by: org.apache.rocketmq.acl.common.AclException: [10015:signature-failed] unable to calculate a request signature. error=Algorithm HmacSHA1 not available
at org.apache.rocketmq.acl.common.AclSigner.sign(AclSigner.java:63)
at org.apache.rocketmq.acl.common.AclSigner.signAndBase64Encode(AclSigner.java:79)
... 12 more
Caused by: java.security.NoSuchAlgorithmException: Algorithm HmacSHA1 not available
at javax.crypto.Mac.getInstance(Mac.java:181)
根据错误的信息我们主要看一下错误编码10015，主要说的是signature-failed，不能够计算请求的签名
解决方案
方案一：上网搜索的方案都是修改Broker下的tools.sh文件，在文件中添加jre/lib/ext目录，我也跟着配置了一下，但是发现好像依然没有办法解决报错的问题。
方案二：在部署RocketMQ集群的虚拟机上执行export NAMESRV_ADDR=ip:9876，我试了下也没有小郭
方案三：进入jdk目录中找到sunjec_provider.jar，将jar包复制到Broker的lib下，在输入命令完成运行
再次运行 就可以看到正确的输出了
[rocketmq@d4f9b634b4b2 bin]$ mqadmin topicList
RocketMQLog:WARN No appenders could be found for logger (io.netty.util.internal.PlatformDependent0).
RocketMQLog:WARN Please initialize the logger system properly.
%RETRY%please_rename_unique_group_name
RMQ_SYS_TRANS_HALF_TOPIC
%RETRY%scGroup
%RETRY%please_rename_unique_group_name_4
TRANS_CHECK_MAX_TIME_TOPIC
结尾
这一篇我们主要是为了解决mqadmin命令报错的问题，下一篇就主要来看一下RocketMQ常用命令的使用。