java/lang/ProcessBuilder/Basic.java fails intermittently

TESTFAIL:java/lang/ProcessBuilder/Basic.java

java/lang/ProcessBuilder/Basic.java still fails intermittently in TL nightly even after the fix of JDK-6703075 and JDK-8022206

Recent 3 failures are all happen on solaris:

This appears to be a Unix system.
Testing ASCII environment values
Testing directory .
Testing directory ..
Testing directory /
Testing directory /bin
cmdp
cmdp 0: /Users/aurora/sandbox/jdk/jre/bin/java
cmdp 1: -XX:+DisplayVMOutputToStderr
cmdp 2: -classpath
cmdp 3: /Users/aurora/sandbox/jtreg/lib/javatest.jar:/Users/aurora/sandbox/jtreg/lib/jtreg.jar:/Users/aurora/sandbox/gresults/testoutput/jdk_lang/JTwork/classes/java/lang/ProcessBuilder:/Users/aurora/sandbox/testbase/test/java/lang/ProcessBuilder:/Users/aurora/sandbox/jdk/lib/tools.jar
cmdp 4: Basic$JavaChild
cmdp 5: System.getenv()
envp
envp 0: LC_ALL=C\u0000\u0000
envp 1: FO\u0000=B\u0000R
waitFor() wasn't interrupted

Passed = 9010, failed = 1

----------System.err:(18/869)----------
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:1328)
at Basic.fail(Basic.java:2428)
at Basic.fail(Basic.java:2429)
at Basic$73.run(Basic.java:2253)
java.lang.AssertionError: Some tests failed
at Basic.main(Basic.java:2440)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:744)

JavaTest Message: Test threw exception: java.lang.AssertionError: Some tests failed
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.AssertionError: Some tests failed