Discussed further in #2402 (comment)

OTLP exporter as of today

• try to export, with a 30 10 second timeout, fail and wait 2 seconds
• try to export, with a 30 10 second timeout, fail and wait 4 seconds
• try to export, with a 30 10 second timeout, fail and wait 8 seconds
• try to export, with a 30 10 second timeout, fail and wait 16 seconds
• try to export, with a 30 10 second timeout, fail and wait 32 seconds
• try to export, with a 30 10 second timeout, fail and wait 64 seconds and finally give up

In an ideal scenario the BSP has to cancel the export call after 30s irrespective of exporter handling mechanism. But it doesn't do that with 30s export mills timeout passed to via env/arg.