When yrying to import trello data into jira through trello importer getting the following exception

[prasanthi padmasale]

Could anyone please help me out on this.

2017-05-16 11:06:39,223 ERROR - Unexpected failure occurred. Importer will stop immediately. Data may be in an unstable state
com.atlassian.jira.plugins.importer.trello.fetch.TrelloParseException: Error "?

Caused by: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
at com.google.gson.Gson.fromJson(Gson.java:801)
at com.google.gson.Gson.fromJson(Gson.java:756)
at com.google.gson.Gson.fromJson(Gson.java:705)
at com.atlassian.jira.plugins.importer.trello.fetch.TrelloParser.getCards(TrelloParser.java:83)
... 33 more
Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
at com.google.gson.stream.JsonReader.beginArray(JsonReader.java:328)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
at com.google.gson.Gson.fromJson(Gson.java:790)
... 36 more

[Sunitha Kanavath]

I got this error because the Trello Board I  tried to import had nearly 7000 check lists. Remove the checklists that are old or in unused state.

Try to Import Again.

[Dario B]

Apparently with too many check lists it was taking too long and therefore timing out.

This is a known bug tracked as:

- https://jira.atlassian.com/browse/JRACLOUD-63646

- https://jira.atlassian.com/browse/JRASERVER-63646