Intermittent search querying issues

Elastic Stack Elasticsearch
1

Hi,

We are using elastic search in our backend hosted on AWS. And our backend is in Java. We have seen a pattern where queries start failing for a brief period of time with the following error:
cannot write time value xcontent for unknown value of type class java.util.Date

This auto resolves itself after some time. But keeps happening every once in a while. Could you help me figure out what the issue is?

Cheers,
Sajjan

2

Are you using AWS Elasticsearch service or self hosting on AWS? Which version are you using? Is there anything relevant in the Elasticsearch logs?

3

We are using AWS hosted Elastic Search java sdk version: 7.8.1.

The logs only have this xcontent error. Nothing relevant unfortunately. But the error seems to generally happen when we do a server deployment. So, could be some sort of an initialization issue?

4

If you are using AWS Elasticsearch it is hard to help as they are using a custom fork with custom plugins. I would recommend contacting AWS support.

5

Hi Christian,

I just checked with my team. We don't infact use AWS elastic search because they don't support 7.8.1 version and we didn't want to go back. Sorry for the confusion! I really need help solving this!

6

Then you should have access to the Elasticsearch logs. Is there anything relevant there around the times you have experienced these problems?

7

I haven't seen the exact logs printed around the time of the error. Will get the logs from elastic search for that time.

8

Are you using any third-party plugins? Do you have any non-standard configuration?

9

No, we are not. I can't find any relevant logs around the same time when the error occurs in Elastic Search.
I see an error n the ES logs but might be unrelated.

10

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