httpAddresses of TestCluster (ES 7.0)

Elastic Stack Elasticsearch
1

the cluster method from ESIntegTestCase.java returns a TestCluster.

It seems that the behavior of the output of httpAddresses of cluster() is different between 7.0 and 6.0.

In the 7.0 version
cluster().httpAddresses() returns 0.0.0.0:0

In the 6.0 version
cluster().httpAddresses() returns 127.0.0.1:49753 and 127.0.0.1:49754

Is it expected?

1 Like
2

I have same problem. It is because in v7 there is actually MockHttpTransport used which is reporting 0.0.0.0:0. In v6 Netty4HttpServerTransport is used. I don't know why. Which HttpServerTransport will be used is decided in InternalTestCluster.getInstances(HttpServerTransport.class) and that is somehow related to node.
I think MockHttpTransport should not be choosed in InternalTestCluster in ESIntegTestCase.
Someone from elasticsearch should shed some light on this.

3

Hi @mbrunat

After some research, I found the root issue was ES deprecated embedded cluster in ES7.0, which made all unit tests failing.

Definitely would be helpful if someone from ES could confirm this.

4

Strange, either InternalTestCluster nor TestCluster is not annotated as deprecated, even in 7.4.
Where is that information coming from?

5

InternalTestCluster.buildNode prepares MockNode which newHttpTransport() method creates MockHttpTransport if plugin MockHttpTransport.TestPlugin is enabled. So solution can be to disable this plugin. I'll try ...

6

Oh, ESIntegTestCase.addMockHttpTransport() override

7

@mbrunat I read about it from some ES Github discussion. Couldn't find the post.

8

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