We have a system that has to use gRPC and doesn't support epoll. So we are
using 'poll' as GRPC_POLL_STRATEGY. With that change we are seeing a
strange behavior when we send data with 6MB of data size. Below mentioned
error was seen with the python receiver.
gRPC client(c++) is built with 1.0.0 and gRPC receiver(python) is built
using 1.9.0.
Please note that with same c++ grpc client running with 'epoll' as
GRPC_POLL_STRATEGY on a system that supports epoll we don't see the issue
with the same data. Also the receiver is set with max receiver size of 32MB.
Can you please let me know how can I debug this issue further?
<Error>
E0226 16:01:37.708911000 123145525346304 call.cc:1406]
receiving_slice_ready:
{"created":"@1519689697.708873000","description":"Stream
removed","file":"src/core/ext/transport/chttp2/transport/chttp2_transport.cc","file_line":2063,"referenced_errors":[{"created":"@1519689697.708859000","description":"Endpoint
read
failed","file":"src/core/ext/transport/chttp2/transport/chttp2_transport.cc","file_line":2410,"occurred_during_write":0,"referenced_errors":[{"created":"@1519689697.708832000","description":"Socket
closed","fd":9,"file":"src/core/lib/iomgr/tcp_posix.cc","file_line":421,"grpc_status":14,"target_address":"ipv4:1.2.3.4:39632"}]}]}
</Error>
<Snip>
https://grpc.io/grpc/cpp/md_doc_environment_variables.html
GRPC_POLL_STRATEGY [posix-style environments only] Declares which polling
engines to try when starting gRPC. This is a comma-separated list of
engines, which are tried in priority order first -> last. Available polling
engines include:
- epoll (linux-only) - a polling engine based around the epoll family of
system calls
- poll - a portable polling engine based around poll(), intended to be a
fallback engine when nothing better exists
- legacy - the (deprecated) original polling engine for gRPC
</Snip>
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