Plugin install failed

[ghost]

I'm tring to install the plugin, but i got following error:

./logstash-plugin install logstash-input-log4j2
Validating logstash-input-log4j2
Installing logstash-input-log4j2
Plugin version conflict, aborting
ERROR: Installation Aborted, message: Bundler could not find compatible versions for gem "logstash-core":
  In snapshot (Gemfile.lock):
    logstash-core (= 2.4.0)

  In Gemfile:
    logstash-core-plugin-api (= 1.60.4) java depends on
      logstash-core (<= 2.4.99, >= 2.4.0) java

    logstash-output-zeromq (< 3.0.0) java depends on
      logstash-core (< 3.0.0, >= 2.0.0.beta2) java

    logstash-output-zeromq (< 3.0.0) java depends on
      logstash-mixin-zeromq (>= 2.0.0) java depends on
        logstash-core (< 3.0.0, >= 2.0.0) java

    logstash-input-log4j2 (>= 0) java depends on
      logstash-core (< 2.0.0, >= 1.4.0) java

    logstash-core (= 2.4.0) java

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.
Bundler could not find compatible versions for gem "logstash":
  In Gemfile:
    logstash-input-log4j2 (>= 0) java depends on
      logstash (< 2.0.0, >= 1.4.0) java
Could not find gem 'logstash (< 2.0.0, >= 1.4.0) java', which is required by gem 'logstash-input-log4j2 (>= 0) java', in any of the sources.

I can't execute bundle update, there isn't bundle script under $LOGSTASH/bin.

I've tried to fix the problem with ./logstash-plugin update, the result is No plugin updated. Now i have no idea, how to install the plugin...