This exception is thrown when an operation fails
The operation requested too much data, exceeding the Market Data Request Limits.
Invalid input data
The session token hasn't been provided, is invalid or has expired.
An application key header ('X-Application') has not been provided in the request
A session token header ('X-Authentication') has not been provided in the request
An unexpected internal error occurred that prevented successful request processing.
The application key passed is invalid or is not present
There are too many pending requests e.g. a listMarketBook with Order/Match projections is limited to 3 concurrent requests. The error also applies to listCurrentOrders, listMarketProfitAndLoss and listClearedOrders if you have 3 or more requests currently in execution
The service is currently too busy to service this request
Internal call to downstream service timed out
the stack trace of the error
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