ES 2.2: Plugin with _search endpoint not loading in embedded node due to "AssertionError"

Elastic Stack Elasticsearch
1

I'm using Elasticsearch v2.2.0
I have a plugin which uses the existing "_search" endpoint. That is, I register the following handlers for my plugin:

  1. /_search
  2. /{index}/_search
  3. /{index}/{type}/_search

The plugin works fine when installed on the standalone cluster. However, when I load it onto a test class extending ESIntegTestCase using:

@Override protected Collection<Class<? extends Plugin>> nodePlugins() { return pluginList(MyPlugin.class); }

and start a test, I get the following error:

[code]org.elasticsearch.common.inject.CreationException: Guice creation errors:

  1. Error injecting constructor, java.lang.AssertionError
    at org.elasticsearch.rest.action.search.RestSearchAction.(Unknown Source)
    while locating org.elasticsearch.rest.action.search.RestSearchAction
    1 error
    at org.elasticsearch.common.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:360)
    at org.elasticsearch.common.inject.InjectorBuilder.injectDynamically(InjectorBuilder.java:178)
    at org.elasticsearch.common.inject.InjectorBuilder.build(InjectorBuilder.java:110)
    at org.elasticsearch.common.inject.Guice.createInjector(Guice.java:93)
    at org.elasticsearch.common.inject.Guice.createInjector(Guice.java:70)
    at org.elasticsearch.common.inject.ModulesBuilder.createInjector(ModulesBuilder.java:46)
    at org.elasticsearch.node.Node.(Node.java:200)
    at org.elasticsearch.node.MockNode.(MockNode.java:43)
    at org.elasticsearch.test.InternalTestCluster.buildNode(InternalTestCluster.java:606)
    at org.elasticsearch.test.InternalTestCluster.reset(InternalTestCluster.java:957)
    at org.elasticsearch.test.InternalTestCluster.beforeTest(InternalTestCluster.java:925)
    at org.elasticsearch.test.ESIntegTestCase.beforeInternal(ESIntegTestCase.java:345)
    at org.elasticsearch.test.ESIntegTestCase.before(ESIntegTestCase.java:1953)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1660)
    at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:900)
    at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:916)
    at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
    ....
    Caused by: java.lang.AssertionError
    at org.elasticsearch.common.path.PathTrie$TrieNode.insert(PathTrie.java:121)
    at org.elasticsearch.common.path.PathTrie.insert(PathTrie.java:203)
    at org.elasticsearch.rest.RestController.registerHandler(RestController.java:118)
    at org.elasticsearch.rest.action.search.RestSearchAction.(RestSearchAction.java:58)
    .....
    ... 47 more
    [/code]

The same behavior repeats when I load the plugin onto a MockNode

Set<Class<? extends Plugin>> plugins = new HashSet<Class<? extends Plugin>>();
plugins.add(SearchIntelPlugin.class);
MockNode mockNode = new MockNode(nodeSettings, Version.CURRENT, plugins);

And similarly, if I use "_cat", I get

 Error injecting constructor, java.lang.AssertionError
  at org.elasticsearch.rest.action.cat.RestCatAction.<init>(Unknown Source)
  while locating org.elasticsearch.rest.action.cat.RestCatAction

with the same stacktrace as above.

Is using an existing endpoint not possible for a plugin?
And also, why does this error appear only for the embedded nodes, and not when used on the standalone cluster?