Noteworthy critical bug fixes
Fix OpenSSL instability on Windows (fix thread id callback) - the bug resulted in SSL connections being torn down for no apparent reason. Fetch response fix: read all MessageSets, not just the first one. (#1384) - Huge performance degradation (compared to v0.9.5) when fetching small batches.
Add api.version.request.timeout.ms (#1277, thanks to @vinipuh5) Point users to documentation when attempting to use Java security properties (#1412)
Adjust log level for partial message reads when debug is enabled (#1433) Allow app metadata() requests regardless of outstanding metadata requests (#1430) Proper size calculation from flags2str to include nul (#1334) Thread-safe rd_strerror() (#1410) Proper re-sends of ProduceRequests in-transit on connection down (#1390) Producer: invalid offsets reported back when produce.offset.report=false Consumer: Message Null Key/Value were messed up (regression in v0.11.0, #1386) Fix metadata querying for topics with LEADER_UNAVAIL set (#1313) Treat request __TIMED_OUT as a retryable error Let timed out ProduceRequests result in MSG_TIMED_OUT error code for messages Fix crash on leader rejoin when outstanding assignor metadata (#1371) sasl_cyrus: Fix dangling stack ptr to sasl_callback_t (#1329, thanks to @gnpdt )
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