Asias He a521c429e1 streaming: Do not send end of stream in case of error ...

Current sender sends stream_mutation_fragments_cmd::end_of_stream to
receiver when an error is received from a peer node. To be safe, send
stream_mutation_fragments_cmd::error instead of
stream_mutation_fragments_cmd::end_of_stream to prevent end_of_stream to
be written into the sstable when a partition is not closed yet.

In addition, use mutation_fragment_stream_validator to valid the
mutation fragments emitted from the reader, e.g., check if
partition_start and partition_end are paired when the reader is done. If
not, fail the stream session and send
stream_mutation_fragments_cmd::error instead of
stream_mutation_fragments_cmd::end_of_stream to isolate the problematic
sstables on the sender node.

Refs: #6478

2020-06-09 18:46:12 +03:00

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