GitHub user merrimanr opened a pull request:
https://github.com/apache/metron/pull/779
METRON-1218: Metron REST should return better error messages
## Contributor Comments
This PR improves the error handling in the REST app and adds logging to
failed searches in the ElasticsearchDao. This can be tested in full dev by
executing a search against REST with a value for "from" that is larger than the
index. For example:
`{
"from": 1000000000,
"indices": [
"bro"
],
"query": "*",
"size": 0
}`
Before it would just return:
`{
"responseCode": 500,
"message": "Could not execute search",
"fullMessage": "Could not execute search"
}`
but after this change it should instead include the root cause:
`{
"responseCode": 500,
"message": "Could not execute search",
"fullMessage": "Result window is too large, from + size must be less than
or equal to: [10000] but was [100000005]. See the scroll api for a more
efficient way to request large data sets. This limit can be set by changing the
[index.max_result_window] index level parameter."
}`
There should also be the full stacktrace in
/var/log/metron/metron-rest.log.
This change should improve all error messages that are returned from REST
and are not limited to this case. I also added a unit test for the REST
exception handler class.
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You can merge this pull request into a Git repository by running:
$ git pull https://github.com/merrimanr/incubator-metron METRON-1218
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/metron/pull/779.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #779
----
commit 0f061223bc2f0e0a8fb6eedcc3cc56427993c005
Author: merrimanr <merrim...@gmail.com>
Date: 2017-09-28T21:53:40Z
initial commit
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