We are using API Connect (APIC) on Bluemix. We have an invoke action on APIC assembly editor and see "500 Internal Server Error" when we invoke a URL which returns about 100MB data . We opened a Bluemix ticket (5377-13438679) to investigate, then it turned out to be caused by the timeout (60 secs) of the Softlayer loadbalancer. The request succeeds if it goes directly to APIC gateway, however, it fails with 500 error if it goes to the the Softlayer loadbalancer. We cannot provide some APIs because of this timeout setting. Please have a look at comment 49 and 50 of RTC Support Ticket 475119 for the details.
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