[Solved]Mutate not working

I upgraded logstash from 2.3.4 to 5.6.7, after the upgrade, mutate failed to remove any of the field. What do I need to check to make sure I have the right plugin?

LS 5.6.7
ES 2.4.1

I'm sure you have the right plugin. Perhaps you were relying on undocumented behavior that happened to change in recent Logstash releases. If you show us your configuration and an example input event we can help out.

input {
kafka {group_id=>"xxxxxx" topics =>"xxxxx" type=>"route" bootstrap_servers=>"IP:9092" consumer_threads=>3} }
filter {
if [type] == "route" { mutate { remove_field => ["api_id"] } json{source=>"message" }} }

"_index": "xxxxxx",
"_type": "route",
"_id": "xxxxxxxxx",
"_score": null,
"_source": {
"api_id": "xxxxxxxx",

even just removing one field, I couldn't get it to work.

I had to move

json{source=>"message" }

to the front of my filter and it started working.

The document clearly doesn't have a type field so the if [type] == "route" conditional is false.

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