BP-69: Convert stream/distributedlog modules to slog (phase 5)#4757
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merlimat merged 3 commits intoapache:masterfrom Apr 28, 2026
Merged
BP-69: Convert stream/distributedlog modules to slog (phase 5)#4757merlimat merged 3 commits intoapache:masterfrom
merlimat merged 3 commits intoapache:masterfrom
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Minimal scaffolding commit for the BP-69 slog migration series: - Add `io.github.merlimat.slog:slog:0.9.7` to the root pom.xml dependencyManagement and to the global compile classpath alongside the existing SLF4J API (which stays as the rendering backend). - Add lombok.config at the repo root so `@CustomLog` generates a slog `Logger` instead of an SLF4J one. - Register the slog jar in LICENSE-all.bin.txt, LICENSE-server.bin.txt and LICENSE-bkctl.bin.txt so the CI check-binary-license script finds it accounted for in the bundled-jars list. No actual Java file is converted in this commit. Individual module migrations stack on top of this one.
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Pulls in the MDC propagation fix from merlimat/slog#6, which makes log4j2 ThreadContext entries visible on slog events emitted via the Log4j2Logger backend (so %X{key} layouts and appenders that read event.getContextData().getValue(key) see the caller's MDC).
zymap
approved these changes
Apr 28, 2026
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Summary
Part of BP-69 (SLF4J to slog migration). Converts the
stream/distributedlog/*andstream/*modules to use slog for structured logging.Stacked with (but independent of) #4754 / #4755 / #4756 — includes the same minimal base scaffolding commit:
BP-69 base: add slog dependency and LICENSE entries— adds slog to rootpom.xml, updatesLICENSE-*.bin.txtfiles, and addslombok.configfor the@CustomLogannotation.BP-69: Convert stream module from SLF4J to slog— the actual module conversion (213 files).Scope
Modules converted:
stream/bk-grpc-name-resolverstream/clients/java/{all,base,kv}stream/commonstream/distributedlog/{common,core,io/dlfs,protocol}stream/serverstream/statelibstream/storage/implstream/tests-commonConversion patterns applied
LoggerFactory.getLogger(Foo.class)/@Slf4j→ Lombok@CustomLoggenerating a slogLogger.log.info("text {} {}", a, b)→log.info().attr("nameA", a).attr("nameB", b).log("text")— values become typed structured attributes.log.error("msg", exception)→log.error().exception(exception).log("msg").ledgerId,entryId,streamId,rangeId,logSegment,storageContainer,routingKey, etc.No changes to log output format — slog with the SLF4J backend produces equivalent output.
Test plan
mvn -pl stream/... compilepassesmvn -pl stream/... checkstyle:checkpasses