We have a 7 node cluster with 6 of them running ES version 5.2.1. One of the nodes is on 5.6.6. We observe that this node leaves the cluster intermittently.
I have grabbed the log when the node disconnects from the cluster
As per this link
this might come from different versions of ES and different version of java as well. But since that's an issue for older version of ES I am trying to reconfirm.
Unfortunately java versions on the nodes are different as well
On 5.2.1 node
$ java -version
openjdk version "1.8.0_121"
OpenJDK Runtime Environment (build 1.8.0_121-b13)
OpenJDK 64-Bit Server VM (build 25.121-b13, mixed mode)
On 5.6.6 node
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)
Here is the log when the node disconnects from the cluster
I am just trying to confirm if the different ES versions is the issue here or it could be something else.