Error running bloop-server-start-check (Cannot run program "ps")

[francisdb]

Version(s)
Scala 3.5.0

Describe the bug
When running in the graalvm-ce-22.3.3-b1-java17 / ghcr.io/graalvm/graalvm-community:22.0.1-ol9 docker image the following error pops up

> scala test.scala
...
#6 5.682 Downloaded https://repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.12.19/scala-compiler-2.12.19.jar
#6 5.744 Downloaded https://repo1.maven.org/maven2/io/get-coursier/interface/1.0.13/interface-1.0.13.jar
#6 5.779 Starting compilation server
#6 6.402 Error: Error running bloop-server-start-check (java.io.IOException: Cannot run program "ps": error=2, No such file or directory)
#6 6.492 Error: Error running bloop-server-start-check (java.io.IOException: Cannot run program "ps": error=2, No such file or directory)
...
#6 65.79 Error: Error running bloop-server-start-check (java.io.IOException: Cannot run program "ps": error=2, No such file or directory)
#6 65.80 Error: java.io.IOException: Cannot run program "ps": error=2, No such file or directory
#6 65.80 For more details, please see '/app/.scala-build/stacktraces/1724705998-10644603136351098915.log'

see also sbt/docker-sbt#298

[tgodzik]

Thanks for reporting! So ps is not available on your system? In that case we should not assume it.

[tgodzik]

Also, could you add a full stack trace from /app/.scala-build/stacktraces/1724705998-10644603136351098915.log if possible?

[francisdb]

the docker images for graalvm do not contain ps

docker run -it --rm ghcr.io/graalvm/jdk-community:22.0.2 bash
bash-5.1# ps
bash: ps: command not found

there are other ways to get a process list:
https://stackoverflow.com/questions/32913424/how-to-get-all-process-ids-without-ps-command-on-linux

bash-5.1# scala test.scala
Warning: Only java properties are supported in JAVA_OPTS and JDK_JAVA_OPTIONS environment variables. Other options are ignored: -XX:+UseG1GC
bash: line 1: tput: command not found
Downloading compilation server 1.5.17-sc-2
Starting compilation server
Error: Error running bloop-server-start-check (java.io.IOException: Cannot run program "ps": error=2, No such file or directory)
...
Error: java.io.IOException: Cannot run program "ps": error=2, No such file or directory
For more details, please see '/app/.scala-build/stacktraces/1724763123-17675652493906783173.log'

bash-5.1# cat /app/.scala-build/stacktraces/1724763123-17675652493906783173.log
java.io.IOException: Cannot run program "ps": error=2, No such file or directory
  java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1170)
  java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1089)
  scala.sys.process.ProcessBuilderImpl$Simple.run(ProcessBuilderImpl.scala:85)
  scala.sys.process.ProcessBuilderImpl$AbstractBuilder.$bang(ProcessBuilderImpl.scala:145)
  scala.sys.process.ProcessBuilderImpl$AbstractBuilder.slurp(ProcessBuilderImpl.scala:161)
  scala.sys.process.ProcessBuilderImpl$AbstractBuilder.$bang$bang(ProcessBuilderImpl.scala:121)
  libdaemonjvm.internal.Processes$.isRunning(Processes.scala:20)
  libdaemonjvm.internal.LockProcess$Default.$anonfun$isRunning$2(LockProcess.scala:16)
  scala.runtime.java8.JFunction0$mcZ$sp.apply(JFunction0$mcZ$sp.scala:17)
  scala.Option.getOrElse(Option.scala:201)
  libdaemonjvm.internal.LockProcess$Default.isRunning(LockProcess.scala:16)
  libdaemonjvm.client.Connect$.$anonfun$tryConnect$3(Connect.scala:34)
  libdaemonjvm.client.Connect$.$anonfun$tryConnect$3$adapted(Connect.scala:33)
  scala.Option.flatMap(Option.scala:283)
  libdaemonjvm.client.Connect$.ifFiles$1(Connect.scala:33)
  libdaemonjvm.client.Connect$.tryConnect(Connect.scala:44)
  libdaemonjvm.client.Connect$.tryConnect(Connect.scala:13)
  bloop.rifle.internal.Operations$.check(Operations.scala:82)
  bloop.rifle.internal.Operations$.$anonfun$startServer$8(Operations.scala:265)
  bloop.rifle.BloopRifleLogger.$anonfun$runnable$1(BloopRifleLogger.scala:14)
  java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
  java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:358)
  java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
  java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
  java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
  java.base/java.lang.Thread.run(Thread.java:1570)
java.io.IOException: error=2, No such file or directory
  java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
  java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:295)
  java.base/java.lang.ProcessImpl.start(ProcessImpl.java:225)
  java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1126)
  java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1089)
  scala.sys.process.ProcessBuilderImpl$Simple.run(ProcessBuilderImpl.scala:85)
  scala.sys.process.ProcessBuilderImpl$AbstractBuilder.$bang(ProcessBuilderImpl.scala:145)
  scala.sys.process.ProcessBuilderImpl$AbstractBuilder.slurp(ProcessBuilderImpl.scala:161)
  scala.sys.process.ProcessBuilderImpl$AbstractBuilder.$bang$bang(ProcessBuilderImpl.scala:121)
  libdaemonjvm.internal.Processes$.isRunning(Processes.scala:20)
  libdaemonjvm.internal.LockProcess$Default.$anonfun$isRunning$2(LockProcess.scala:16)
  scala.runtime.java8.JFunction0$mcZ$sp.apply(JFunction0$mcZ$sp.scala:17)
  scala.Option.getOrElse(Option.scala:201)
  libdaemonjvm.internal.LockProcess$Default.isRunning(LockProcess.scala:16)
  libdaemonjvm.client.Connect$.$anonfun$tryConnect$3(Connect.scala:34)
  libdaemonjvm.client.Connect$.$anonfun$tryConnect$3$adapted(Connect.scala:33)
  scala.Option.flatMap(Option.scala:283)
  libdaemonjvm.client.Connect$.ifFiles$1(Connect.scala:33)
  libdaemonjvm.client.Connect$.tryConnect(Connect.scala:44)
  libdaemonjvm.client.Connect$.tryConnect(Connect.scala:13)
  bloop.rifle.internal.Operations$.check(Operations.scala:82)
  bloop.rifle.internal.Operations$.$anonfun$startServer$8(Operations.scala:265)
  bloop.rifle.BloopRifleLogger.$anonfun$runnable$1(BloopRifleLogger.scala:14)
  java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
  java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:358)
  java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
  java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
  java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
  java.base/java.lang.Thread.run(Thread.java:1570)

[tgodzik]

I just checked and this should actually be already fixed under the newest Scala CLI, which uses Bloop 2.0.0. It no longer uses ps.

[francisdb]

Any idea if this will make it to new Scala 3 releases? 3.5.2 is still affected.