Change client IO pipeline to be inline with Java client design: IO thread pool, response threads, lock-free writes [HZ-5387]#1412

Merged

ihsandemir merged 59 commits intohazelcast:masterfrom

ihsandemir:rearchitecture

Apr 10, 2026

Commits on Mar 30, 2026

Commits on Apr 7, 2026

Handle backup events on IO thread instead of response handler
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Temporarily disable backup acks to unblock benchmark validation
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pending response fix. need to erase the invocation if completed in the usual completion path.
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Refactor ClientInvocation to use atomic types for backup acknowledgments and pending response management. This change enhances thread safety and ensures correct handling of concurrent operations. R…
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Changed the backup invocation timeout checks from individual connections over to ClientInvocationServiceImpl similar to Java client.
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Fix race condition in ClientInvocation::notify() backup ack handling
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Removed incorrectly committed files.
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clang formatted.
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Added `get_permission_to_notify` check before notifying the invocation to prevent double completions.
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Review comment fix. no. need for lock-free queue initial sizing.
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Review comment fix.
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Fixed response message handle order.
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Disable the C++17 aligned-new behavior.
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Added the thread count number positive check. review comment fix.
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review comment fix. define magic number.
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review comment fix.
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Update hazelcast/src/hazelcast/client/spi.cpp

ihsandemir
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JackPGreen
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review comment fix.
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Fix invocation hang when sending to a closed connection
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Fix aligned-new compile error on GCC with -fno-aligned-new
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Revert "Fix aligned-new compile error on GCC with -fno-aligned-new"
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Replace -fno-aligned-new with -faligned-new in build script
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Minor refactoring, moving response_handler impl into the spi.cpp.
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Removed unneeded check on response handling.
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Fix two Windows shutdown crashes in rearchitecture branch
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Fixed the ClientInvocation future continuation for sequence id completion so that we use user executor only when available, otherwise complete using boost::launch::sync in the same calling thread.
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clang format fix.
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Bump actions/upload-artifact from 4 to 7 in /.github/actions/coverage-report (#1426)

dependabot[bot]
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Bump actions/setup-java from 4 to 5 in /.github/actions/coverage-report (#1424)

dependabot[bot]
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Bump aws-actions/configure-aws-credentials from 5 to 6 in /.github/actions/coverage-report (#1425)

dependabot[bot]
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Update `membership` check implementation to avoid PAT requirement (#1427)

JackPGreen
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ihsandemir
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Bump actions/checkout from 5 to 6 (#1423)

dependabot[bot]
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ihsandemir
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Upgrade CI clang-format from v18 to v22 [HZ-5387] (#1428)
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Commits on Apr 10, 2026