Cassandra JMX java.rmi.server.ExportException:端口已在使用：7199

我们的卡桑德拉2.2集群（在CentOS 7上）运行良好，除了一件事。当我将

LOCAL_JMX=no

放入cassandra env.sh时，cassandra无法启动，出现以下错误：

Error: Exception thrown by the agent : java.rmi.server.ExportException: Port already in use: 7199; nested exception is:
    java.net.BindException: Address already in use

相关配置如下所示：

  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.authenticate=true"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.password.file=/etc/cassandra/jmxremote.password"
  JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStore=/etc/pki/cassandra/keys/.keystore"
  JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStorePassword=password1"
  JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStore=/etc/pki/cassandra/certs/.truststore"
  JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStorePassword=password2"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.need.client.auth=true"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.registry.ssl=true"

JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.authenticate=true"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.password.file=/etc/cassandra/jmxremote.password"
JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStore=/etc/pki/cassandra/keys/.keystore"
JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStorePassword=password1"
JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStore=/etc/pki/cassandra/certs/.truststore"
JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStorePassword=password2"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.need.client.auth=false"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.registry.ssl=false"

我确实验证了端口上是否没有运行任何东西。如果我改变端口，结果也是一样的。 帮助的是为

jmxremote.port

和

jmxremote.rmi.port

使用不同的端口，尽管这不符合手册中的建议。不幸的是，即使我不能使用nodetool获取

NoSuchObjectException:“表中没有这样的对象”

exception

---

有什么想法吗？非常感谢。

我找到了解决办法。问题出现在以下行中：

JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false"

当我将其切换为true时，可以使用上述设置启动Cassandra（使用公共端口）

然而，这并不意味着问题结束了，因为在使用nodetool时，我开始得到：

nodetool:无法连接到-connectionException:“远程端点处的非JRMP服务器”

最终的解决方案是，问题出在SSL中。该协议不支持JMX使用它。因此，唯一的解决方案是将其关闭，工作配置如下：

  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.authenticate=true"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.password.file=/etc/cassandra/jmxremote.password"
  JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStore=/etc/pki/cassandra/keys/.keystore"
  JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStorePassword=password1"
  JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStore=/etc/pki/cassandra/certs/.truststore"
  JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStorePassword=password2"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.need.client.auth=true"
  JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.registry.ssl=true"

JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.authenticate=true"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.password.file=/etc/cassandra/jmxremote.password"
JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStore=/etc/pki/cassandra/keys/.keystore"
JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStorePassword=password1"
JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStore=/etc/pki/cassandra/certs/.truststore"
JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStorePassword=password2"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.need.client.auth=false"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.registry.ssl=false"

---

然后一切都像一个符咒一样运行。

我也遇到了同样的问题，我也启用了

JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=true"

---

然而，当我使用--ssl选项运行nodetool时，我能够毫无问题地进行身份验证。因此，您可能错过了--ssl选项？

Cassandara也与VMware存在冲突。停止VMware服务后，Cassandra已正确启动。

Where is

Cassandra env.sh

I在没有将

LOCAL_JMX=no

写入此文件的情况下，出现了相同的错误