samplecode: fix possible deadlock in db-server #269
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In samplecode/db-proxy/db-server/src/server/mod.rs:
There are two
db.read()in fnfn db_get(), which may cause deadlock when interleaved by adb.write()(e.g. indb_put()ordb_delete()) from another thread.The fix is to remove the redundant
db.read().