lein repl :connect 7000 给出 ConnectException 连接被拒绝

Question

当我只执行 lein repl 时它可以工作，但是当我尝试连接到主机时出现拒绝连接错误。

Connecting to nREPL at 127.0.0.1:7000
ConnectException Connection refused (Connection refused)
    java.net.PlainSocketImpl.socketConnect (PlainSocketImpl.java:-2)
    java.net.AbstractPlainSocketImpl.doConnect (AbstractPlainSocketImpl.java:400)
    java.net.AbstractPlainSocketImpl.connectToAddress (AbstractPlainSocketImpl.java:243)
    java.net.AbstractPlainSocketImpl.connect (AbstractPlainSocketImpl.java:225)
    java.net.SocksSocketImpl.connect (SocksSocketImpl.java:402)
    java.net.Socket.connect (Socket.java:591)
    java.net.Socket.connect (Socket.java:540)
    java.net.Socket.<init> (Socket.java:436)
    java.net.Socket.<init> (Socket.java:213)
    clojure.tools.nrepl/connect (nrepl.clj:184)
    clojure.tools.nrepl/connect (nrepl.clj:174)
    clojure.core/apply (core.clj:646)
Bye for now!

我试过弄乱我的 /etc/hosts:

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1   localhost
255.255.255.255 broadcasthost
::1             localhost

但是改变它并没有帮助。

设置：

MacOS 10.13.2
Leiningen 2.8.1 on Java 9.0.1 Java HotSpot(TM) 64-Bit Server VM

Answer 1

运行 lein repl 将启动它自己的 nREPL 并连接到它。指定 :connect 7000 不会启动 REPL——它期望一个已经在那个端口上运行。

$ lein repl
nREPL server started on port 57535 on host 127.0.0.1 - nrepl://127.0.0.1:57535
REPL-y 0.3.7, nREPL 0.2.12

在单独的会话中，您应该能够连接到您的 other/running REPL：

$ lein repl :connect 57535
Connecting to nREPL at 127.0.0.1:57535
REPL-y 0.3.7, nREPL 0.2.12

lein repl :connect 7000 给出 ConnectException 连接被拒绝

lein repl :connect 7000 gives ConnectException Connection refused

clojure

leiningen