Use unwrapped underlying subprocess input streams when pumping

[lihaoyi]

Sometimes when you run tests in client/server mode and interrupt the run, it leaves the server stuck at the stack trace below. Eventually, jps shows a bunch of MillServerMain processes that seem to be stuck

The problem seems to go away when using unwrapped streams. I suspect it's due to com-lihaoyi/os-lib#28 which means that the InputPumper calling .available() never gets -1 to indicate the stream is complete, but instead keeps getting 0 telling it to try again.

The failure mode is nondeterministic, but running ./mill main.resolve.test, entering garbage into the terminal, and Ctrl-C to cancel seems to reproduce it reasonably well in a few minutes. And with this PR, I haven't been able to reproduce it: no matter how I fiddle with ./mill main.resolve.test and garbage input and Ctrl-C, I always end up with only a single MillServerMain process when calling jps

I don't know exactly what the failure mechanism is, but as a shot in the dark hopefully this fixes it

"/Library/Java/JavaVirtualMachines/amazon-corretto-17.jdk/Contents/Home/bin/java -DMILL_SCALA_2_13_VERSION=2.13.14 -DMILL_SCALA_2_12_VERSION=2.12.19 -DTEST_SCALA_2_13_VERSION=2.13.14 -DTEST_SCALA_2_13_VERSION_FOR_SCALANATIVE_4_2=2.13.8 -DTEST_SCALA_2_12_VERSION=2.12.6 -DTEST_SCALA_2_11_VERSION=2.11.12 -DTEST_SCALA_2_10_VERSION=2.10.6 -DTEST_SCALA_3_0_VERSION=3.0.2 -DTEST_SCALA_3_1_VERSION=3.1.3 -DTEST_SCALA_3_2_VERSION=3.2.0 -DTEST_SCALA_3_3_VERSION=3.3.1 -DTEST_SCALAJS_VERSION=1.16.0 -DTEST_SCALANATIVE_0_4_VERSION=0.4.17 -DTEST_SCALANATIVE_0_5_VERSION=0.5.4 -DTEST_UTEST_VERSION=0.8.4 -DTEST_SCALATEST_VERSION=3.2.19 -DTEST_TEST_INTERFACE_VERSION=1.0 -DTEST_ZIOTEST_VERSION=2.0.22 -DTEST_ZINC_VERSION=1.10.1 -Djna.nosys=true -cp 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mill.testrunner.entrypoint.TestRunnerMain file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-scalalib_2.13/0.11.11/mill-scalalib_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scalameta/scalafmt-dynamic_2.13/3.7.15/scalafmt-dynamic_2.13-3.7.15.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-xml_2.13/2.3.0/scala-xml_2.13-2.3.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.13.14/scala-library-2.13.14.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-moduledefs_2.13/0.10.9/mill-moduledefs_2.13-0.10.9.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main_2.13/0.11.11/mill-main_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-scalalib-api_2.13/0.11.11/mill-scalalib-api_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-testrunner_2.13/0.11.11/mill-testrunner_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scalameta/scalafmt-interfaces/3.7.15/scalafmt-interfaces-3.7.15.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/interface/1.0.19/interface-1.0.19.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/typesafe/config/1.4.2/config-1.4.2.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.13.10/scala-compiler-2.13.10.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/sourcecode_2.13/0.4.0/sourcecode_2.13-0.4.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/github/alexarchambault/windows-ansi/windows-ansi/0.0.5/windows-ansi-0.0.5.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mainargs_2.13/0.7.1/mainargs_2.13-0.7.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/requests_2.13/0.8.3/requests_2.13-0.8.3.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-eval_2.13/0.11.11/mill-main-eval_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-resolve_2.13/0.11.11/mill-main-resolve_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-client/0.11.11/mill-main-client-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-api_2.13/0.11.11/mill-main-api_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-util_2.13/0.11.11/mill-main-util_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-testrunner-entrypoint/0.11.11/mill-testrunner-entrypoint-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/slf4j/slf4j-api/1.7.36/slf4j-api-1.7.36.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.13.12/scala-reflect-2.13.12.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/github/java-diff-utils/java-diff-utils/4.12/java-diff-utils-4.12.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/jline/jline/3.26.3/jline-3.26.3.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/net/java/dev/jna/jna/5.14.0/jna-5.14.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/fusesource/jansi/jansi/1.18/jansi-1.18.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-collection-compat_2.13/2.12.0/scala-collection-compat_2.13-2.12.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/geny_2.13/1.1.1/geny_2.13-1.1.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-define_2.13/0.11.11/mill-main-define_2.13-0.11.11.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/os-lib_2.13/0.10.3/os-lib_2.13-0.10.3.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/upickle_2.13/3.3.1/upickle_2.13-3.3.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/pprint_2.13/0.9.0/pprint_2.13-0.9.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/fansi_2.13/0.5.0/fansi_2.13-0.5.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-sbt/test-interface/1.0/test-interface-1.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier_2.13/2.1.10/coursier_2.13-2.1.10.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/net/java/dev/jna/jna-platform/5.14.0/jna-platform-5.14.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/eed3si9n/jarjarabrams/jarjar-abrams-core_2.13/1.14.0/jarjar-abrams-core_2.13-1.14.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/scalaparse_2.13/3.1.1/scalaparse_2.13-3.1.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/kohlschutter/junixsocket/junixsocket-native-common/2.10.0/junixsocket-native-common-2.10.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/kohlschutter/junixsocket/junixsocket-common/2.10.0/junixsocket-common-2.10.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ujson_2.13/3.3.1/ujson_2.13-3.3.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/upack_2.13/3.3.1/upack_2.13-3.3.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/upickle-implicits_2.13/3.3.1/upickle-implicits_2.13-3.3.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/github/plokhotnyuk/jsoniter-scala/jsoniter-scala-core_2.13/2.13.5.2/jsoniter-scala-core_2.13-2.13.5.2.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier-core_2.13/2.1.10/coursier-core_2.13-2.1.10.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier-cache_2.13/2.1.10/coursier-cache_2.13-2.1.10.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier-proxy-setup/2.1.10/coursier-proxy-setup-2.1.10.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/eed3si9n/jarjar/jarjar/1.14.0/jarjar-1.14.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/fastparse_2.13/3.1.1/fastparse_2.13-3.1.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/upickle-core_2.13/3.3.1/upickle-core_2.13-3.3.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/github/alexarchambault/concurrent-reference-hash-map/1.1.0/concurrent-reference-hash-map-1.1.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier-util_2.13/2.1.10/coursier-util_2.13-2.1.10.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/jniutils/windows-jni-utils/0.3.3/windows-jni-utils-0.3.3.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-archiver/4.9.0/plexus-archiver-4.9.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-container-default/2.1.1/plexus-container-default-2.1.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/virtuslab/scala-cli/config_2.13/0.2.1/config_2.13-0.2.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/ow2/asm/asm/9.6/asm-9.6.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/ow2/asm/asm-commons/9.6/asm-commons-9.6.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/javax/inject/javax.inject/1/javax.inject-1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-utils/4.0.0/plexus-utils-4.0.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-io/3.4.1/plexus-io-3.4.1.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/commons-io/commons-io/2.15.0/commons-io-2.15.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/commons/commons-compress/1.24.0/commons-compress-1.24.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/iq80/snappy/snappy/0.4/snappy-0.4.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/tukaani/xz/1.9/xz-1.9.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/github/luben/zstd-jni/1.5.5-10/zstd-jni-1.5.5-10.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-classworlds/2.6.0/plexus-classworlds-2.6.0.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/xbean/xbean-reflect/3.7/xbean-reflect-3.7.jar,file:/Users/lihaoyi/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/ow2/asm/asm-tree/9.6/asm-tree-9.6.jar /Users/lihaoyi/Github/mill/out/main/resolve/test/test.dest/testargs stdin thread" #30 prio=5 os_prio=31 cpu=56.56ms elapsed=13.94s tid=0x0000000163032800 nid=0xa507 waiting on condition  [0x000000016f72e000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
	at java.lang.Thread.sleep([email protected]/Native Method)
	at mill.main.client.InputPumper.run(InputPumper.java:39)
	at java.lang.Thread.run([email protected]/Thread.java:833)

[lefou]

So, what does that mean in effect, beside the sub-process now being reliably terminated? Do we loose decorations?

[lihaoyi]

It shouldnt have any effect AFAIK. The oslib stream wrappers were mesnt to be just for convenience, providing DataInputStream and BufferedReader APIs in case people needed it. But we never used those APIs