I have tried to backup and download .fess_config.bulk, the response is:
{
"error": {
"root_cause": [
{
"type": "exception",
"reason": "Content size is too large 287437759"
}
],
"type": "exception",
"reason": "Content size is too large 287437759"
},
"status": 500
}
.fess_config.bulk contains data of Failure URL. If there are a lot of Failure URLs, .fess_config.bulk will be large. If you want to create backup data for configurations, it’s better to use .fess_basic_config.bulk, which does not contain Failure URLs.
If you want .fess_config.bulk, I think you need to upgrade to the latest version of Fess.