Lewis John McGibbney created TEZ-4696:
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Summary: Fix Maven build: register generated-sources and fork
compiler to resolve test-compile failures
Key: TEZ-4696
URL: https://issues.apache.org/jira/browse/TEZ-4696
Project: Apache Tez
Issue Type: Bug
Reporter: Lewis John McGibbney
Assignee: Lewis John McGibbney
Fix For: 1.0.0
When attempting to build Tez 1.0.0-SNAPSHOT I discovered and fixed two build
issues which were originally patched alongside TEZ-4694. It was recommended I
propose them in a separate ticket
# *Register generated-sources for compilation:* Use the
build-helper-maven-plugin to add
{{${project.build.directory}/generated-sources/java}} as a source directory in
the {{generate-sources}} phase in tez-mapreduce, tez-runtime-library,
tez-runtime-internals, and tez-dag. This makes protobuf-generated Java (e.g.
DAGApiRecords, MRRuntimeProtos, ShufflePayloads, HistoryEvents) part of the
compile source set so it is compiled and on the classpath, fixing "package does
not exist" / "cannot find symbol" for generated types.
# *Fork compiler and set max memory:* Configure the maven-compiler-plugin with
{{<fork>true</fork>}} and {{<maxmem>1024m</maxmem>}} in tez-mapreduce,
tez-runtime-internals, and tez-dag. Compilation runs in a forked JVM so main
and test-compile don’t race on the same process, avoiding
{{NoSuchFileException}} for {{.class}} files during test-compile (e.g. with
parallel reactor builds).
Trivial PR coming up
java --version
openjdk 21.0.10 2026-01-20
OpenJDK Runtime Environment Homebrew (build 21.0.10)
OpenJDK 64-Bit Server VM Homebrew (build 21.0.10, mixed mode, sharing)
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