RFR: Fix NullPointerException on a parallel run

[Dmitry Bessonov]

On Wed, 17 Aug 2022 13:12:28 GMT, Jan Kratochvil <duke at openjdk.org> wrote:

> Error: Unexpected exception occurred! java.lang.NullPointerException
> java.lang.NullPointerException
> 	at com.sun.javatest.regtest.config.TestProperties$Cache.getEntryInternal(TestProperties.java:515)
> 	at com.sun.javatest.regtest.config.TestProperties$Cache.getEntryInternal(TestProperties.java:515)
> 	at com.sun.javatest.regtest.config.TestProperties$Cache.getEntry(TestProperties.java:502)
> 	at com.sun.javatest.regtest.config.TestProperties.getEntry(TestProperties.java:170)
> 	at com.sun.javatest.regtest.config.TestProperties.getTestNGRoot(TestProperties.java:123)
> 	at com.sun.javatest.regtest.config.RegressionTestFinder.scanFile(RegressionTestFinder.java:143)
> 	at com.sun.javatest.finder.TagTestFinder.scan(TagTestFinder.java:115)
> 	at com.sun.javatest.TestFinder.read(TestFinder.java:433)
> 	at com.sun.javatest.TRT_TreeNode.processFile(TRT_TreeNode.java:1259)
> 	at com.sun.javatest.TRT_TreeNode.scanIfNeeded(TRT_TreeNode.java:807)
> 	at com.sun.javatest.TRT_TreeNode.getTreeNode(TRT_TreeNode.java:616)
> 	at com.sun.javatest.TestResultTable.findNode(TestResultTable.java:400)
> 	at com.sun.javatest.TestResultTable.lookupNode(TestResultTable.java:533)
> 	at com.sun.javatest.TestResultTable.lookupInitURL(TestResultTable.java:571)
> 	at com.sun.javatest.TestResultTable.validatePath(TestResultTable.java:1000)
> 	at com.sun.javatest.regtest.config.TestManager.validatePath(TestManager.java:299)
> 	at com.sun.javatest.regtest.config.TestManager.getTests(TestManager.java:271)
> 	at com.sun.javatest.regtest.tool.Tool.createParameters(Tool.java:1659)
> 	at com.sun.javatest.regtest.tool.Tool.run(Tool.java:1293)
> 	at com.sun.javatest.regtest.tool.Tool.run(Tool.java:1082)
> 	at com.sun.javatest.regtest.tool.Tool.main(Tool.java:155)
> 	at com.sun.javatest.regtest.Main.main(Main.java:46)
> 
> 
> Some debug output showing the problem:
> 
> 	scanIfNeeded getRootRelativePath= separator=/ filesToScan[i]=resultdir
> 	processFile file=/resultdir isAbsolute=true
> 	TestFinder.java read file=/resultdir isAbsolute=true
> 	scanFile caller file=/resultdir
> 	scanFile File=/resultdir
> 	TestProperties.java:dir=/ rootDir=/home/azul/azul/zulu11-git/test/hotspot/jtreg file2=/resultdir file2.getParentFile()=/
> 	TestProperties.java:dir=null rootDir=/home/azul/azul/zulu11-git/test/hotspot/jtreg file2=/resultdir file2.getParentFile()=/
> 
> This happens with jtreg using `-w:resultdir` . `getRootRelativePath()` returns empty `""` path. Other option would be to return `"."` but in such case it broke some other code.
> 
> This problem does not happen during a single run. It happens only when jtreg is being run in parallel, in my case:
> 
> 	seq 1 100000|xargs -n1 -P64 ./runtest
> 	#! /bin/bash
> 	dir=result-test$$
> 	rm -rf $dir
> 	mkdir $dir
> 	set -o pipefail
> 	(JAVA_HOME=$HOME/azul/zulu11-git/build/linux-x86_64-normal-server-release/images/jdk/; $JAVA_HOME/bin/java -classpath $HOME/azul/jtreg/build/images/jtreg/lib/jtreg.jar:$HOME/azul/jtreg/build/images/jtreg/lib/javatest.jar:$HOME/azul/jtreg/build/images/jtreg/lib/asmtools.jar com.sun.javatest.regtest.Main -testjdk:$JAVA_HOME -othervm -verbose -ignore:quiet -retain:all -a -conc:1 -timeout:10 -vmoptions:-XX:+UnlockExperimentalVMOptions -w:$dir -noreport -dir:$JAVA_HOME/../../../../test/jdk/ -nativepath:$JAVA_HOME/../test/hotspot/jtreg/native ../hotspot/jtreg/vmTestbase/nsk/jdi/stress/serial/heapwalking001/TestDescription.java |& tee $dir/err) || exit 255
> 	rm -rf $dir
> 
> 
> Unforunately I am not yet Author so I do not yet have a JBS account so I cannot file it to JBS (Java Bug System).

could it be a dup of https://bugs.openjdk.org/browse/CODETOOLS-7903229 ?

-------------

PR: https://git.openjdk.org/jtharness/pull/35