This test is failing on some JPRT machines, might be 64-bit only. The following are two examples from linux-x64 and solaris-sparcv9. It's not obvious from the output what is going on so it may be benefical to include more output in the test.

--------------------------------------------------
TEST: sun/tools/jcmd/jcmd-Defaults.sh
JDK under test: (/tmp/jprt/P1/124459.albatem/testproduct/linux_x64_2.6-product)
java version "1.8.0-internal"
Java(TM) SE Runtime Environment (build 1.8.0-internal-201202111244.albatem.tl-b00)
Java HotSpot(TM) 64-Bit Server VM (build 23.0-b14, mixed mode)

ACTION: shell -- Failed. Execution failed: exit code 1
REASON: User specified action: run shell jcmd-Defaults.sh
TIME: 1.093 seconds
messages:
command: shell jcmd-Defaults.sh []
reason: User specified action: run shell jcmd-Defaults.sh
elapsed time (seconds): 1.093
STDOUT:
14153 com.sun.javatest.regtest.Agent -allowSetSecurityManager -port 57114
19834 com.sun.tools.javac.Main -d /tmp/jprt/P2/124459.albatem/source/jdk/build/linux-amd64/testoutput/jdk_management2/JTwork/classes/sun/management/HotspotRuntimeMBean -classpath /opt/jprt/products/P2/jtreg4.1-latest/jtreg/lib/javatest.jar:/opt/jprt/products/P2/jtreg4.1-latest/jtreg/lib/jtreg.jar:/tmp/jprt/P2/124459.albatem/source/jdk/build/linux-amd64/testoutput/jdk_management2/JTwork/classes/sun/management/HotspotRuntimeMBean:/tmp/jprt/P2/124459.albatem/source/jdk/test/sun/management/HotspotRuntimeMBean:/tmp/jprt/P2/124459.albatem/testproduct/linux_x64_2.6-product/lib/tools.jar -sourcepath /tmp/jprt/P2/124459.albatem/source/jdk/test/sun/management/HotspotRuntimeMBean:/tmp/jprt/P2/124459.albatem/testproduct/linux_x64_2.6-product/lib/tools.jar /tmp/jprt/P2/124459.albatem/source/jdk/test/sun/management/HotspotRuntimeMBean/GetTotalSafepointTime.java
11145 /opt/jprt/dist/jprt.jar startclient -instancename P2
14020 /opt/jprt/products/P1/jtreg4.1-latest/jtreg/lib/jtreg.jar -agentvm -server -Duser.home=/tmp/jprt/P1/124459.albatem -Djava.io.tmpdir=/tmp/jprt/P1/124459.albatem/io/linux_x64-product-c2-jdk_tools2 -vmoption:-server -vmoption:-Duser.home=/tmp/jprt/P1/124459.albatem -vmoption:-Djava.io.tmpdir=/tmp/jprt/P1/124459.albatem/io/linux_x64-product-c2-jdk_tools2 -a -ea -esa -v:fail,error,time -retain:fail,error -ignore:quiet -timeoutFactor:4 -r:/tmp/jprt/P1/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_tools2/JTreport -w:/tmp/jprt/P1/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_tools2/JTwork -jdk:/tmp/jprt/P1/124459.albatem/testproduct/linux_x64_2.6-product -exclude:/tmp/jprt/P1/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_tools2/excludelist.txt com/sun/tools sun/jvmstat sun/tools tools vm com/sun/servicetag com/sun/tracing closed/tools closed/vm
19852 sun.tools.jcmd.JCmd
14664 /opt/jprt/products/P2/jtreg4.1-latest/jtreg/lib/jtreg.jar -a -ea -esa -v:fail,error,time -retain:fail,error -ignore:quiet -timeoutFactor:4 -r:/tmp/jprt/P2/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_management2/JTreport -w:/tmp/jprt/P2/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_management2/JTwork -jdk:/tmp/jprt/P2/124459.albatem/testproduct/linux_x64_2.6-product -exclude:/tmp/jprt/P2/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_management2/excludelist.txt -javaoptions:-server -javaoptions:-Duser.home=/tmp/jprt/P2/124459.albatem -javaoptions:-Djava.io.tmpdir=/tmp/jprt/P2/124459.albatem/io/linux_x64-product-c2-jdk_management2 com/sun/jmx com/sun/management sun/management closed/sun/management
10707 /opt/jprt/dist/jprt.jar startclient -instancename P1
14153 com.sun.javatest.regtest.Agent -allowSetSecurityManager -port 57114
19834 com.sun.tools.javac.Main -d /tmp/jprt/P2/124459.albatem/source/jdk/build/linux-amd64/testoutput/jdk_management2/JTwork/classes/sun/management/HotspotRuntimeMBean -classpath /opt/jprt/products/P2/jtreg4.1-latest/jtreg/lib/javatest.jar:/opt/jprt/products/P2/jtreg4.1-latest/jtreg/lib/jtreg.jar:/tmp/jprt/P2/124459.albatem/source/jdk/build/linux-amd64/testoutput/jdk_management2/JTwork/classes/sun/management/HotspotRuntimeMBean:/tmp/jprt/P2/124459.albatem/source/jdk/test/sun/management/HotspotRuntimeMBean:/tmp/jprt/P2/124459.albatem/testproduct/linux_x64_2.6-product/lib/tools.jar -sourcepath /tmp/jprt/P2/124459.albatem/source/jdk/test/sun/management/HotspotRuntimeMBean:/tmp/jprt/P2/124459.albatem/testproduct/linux_x64_2.6-product/lib/tools.jar /tmp/jprt/P2/124459.albatem/source/jdk/test/sun/management/HotspotRuntimeMBean/GetTotalSafepointTime.java
11145 /opt/jprt/dist/jprt.jar startclient -instancename P2
14020 /opt/jprt/products/P1/jtreg4.1-latest/jtreg/lib/jtreg.jar -agentvm -server -Duser.home=/tmp/jprt/P1/124459.albatem -Djava.io.tmpdir=/tmp/jprt/P1/124459.albatem/io/linux_x64-product-c2-jdk_tools2 -vmoption:-server -vmoption:-Duser.home=/tmp/jprt/P1/124459.albatem -vmoption:-Djava.io.tmpdir=/tmp/jprt/P1/124459.albatem/io/linux_x64-product-c2-jdk_tools2 -a -ea -esa -v:fail,error,time -retain:fail,error -ignore:quiet -timeoutFactor:4 -r:/tmp/jprt/P1/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_tools2/JTreport -w:/tmp/jprt/P1/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_tools2/JTwork -jdk:/tmp/jprt/P1/124459.albatem/testproduct/linux_x64_2.6-product -exclude:/tmp/jprt/P1/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_tools2/excludelist.txt com/sun/tools sun/jvmstat sun/tools tools vm com/sun/servicetag com/sun/tracing closed/tools closed/vm
19871 sun.tools.jcmd.JCmd -l
14664 /opt/jprt/products/P2/jtreg4.1-latest/jtreg/lib/jtreg.jar -a -ea -esa -v:fail,error,time -retain:fail,error -ignore:quiet -timeoutFactor:4 -r:/tmp/jprt/P2/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_management2/JTreport -w:/tmp/jprt/P2/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_management2/JTwork -jdk:/tmp/jprt/P2/124459.albatem/testproduct/linux_x64_2.6-product -exclude:/tmp/jprt/P2/124459.albatem/source/jdk/test/../build/linux-amd64/testoutput/jdk_management2/excludelist.txt -javaoptions:-server -javaoptions:-Duser.home=/tmp/jprt/P2/124459.albatem -javaoptions:-Djava.io.tmpdir=/tmp/jprt/P2/124459.albatem/io/linux_x64-product-c2-jdk_management2 com/sun/jmx com/sun/management sun/management closed/sun/management
10707 /opt/jprt/dist/jprt.jar startclient -instancename P1
STDERR:

TEST RESULT: Failed. Execution failed: exit code 1
--------------------------------------------------


--------------------------------------------------
TEST: sun/tools/jcmd/jcmd-Defaults.sh
JDK under test: (/tmp/jprt/P1/165924.albatem/testproduct/solaris_sparcv9_5.10-product)
java version "1.8.0-internal"
Java(TM) SE Runtime Environment (build 1.8.0-internal-201202111659.albatem.tl-b00)
Java HotSpot(TM) 64-Bit Server VM (build 23.0-b14, mixed mode)

ACTION: shell -- Failed. Execution failed: exit code 1
REASON: User specified action: run shell jcmd-Defaults.sh
TIME: 0.607 seconds
messages:
command: shell jcmd-Defaults.sh []
reason: User specified action: run shell jcmd-Defaults.sh
elapsed time (seconds): 0.607
STDOUT:
21952 com.sun.javatest.regtest.Agent -allowSetSecurityManager -port 59824
22372 sun.tools.jcmd.JCmd
21948 /opt/jprt/products/P1/jtreg4.1-latest/jtreg/lib/jtreg.jar -agentvm -d64 -server -Duser.home=/tmp/jprt/P1/165924.albatem -Djava.io.tmpdir=/tmp/jprt/P1/165924.albatem/io/solaris_sparcv9-product-c2-jdk_tools2 -vmoption:-d64 -vmoption:-server -vmoption:-Duser.home=/tmp/jprt/P1/165924.albatem -vmoption:-Djava.io.tmpdir=/tmp/jprt/P1/165924.albatem/io/solaris_sparcv9-product-c2-jdk_tools2 -a -ea -esa -v:fail,error,time -retain:fail,error -ignore:quiet -timeoutFactor:4 -r:/tmp/jprt/P1/165924.albatem/source/jdk/test/../build/solaris-sparcv9/testoutput/jdk_tools2/JTreport -w:/tmp/jprt/P1/165924.albatem/source/jdk/test/../build/solaris-sparcv9/testoutput/jdk_tools2/JTwork -jdk:/tmp/jprt/P1/165924.albatem/testproduct/solaris_sparcv9_5.10-product -exclude:/tmp/jprt/P1/165924.albatem/source/jdk/test/../build/solaris-sparcv9/testoutput/jdk_tools2/excludelist.txt com/sun/tools sun/jvmstat sun/tools tools vm com/sun/servicetag com/sun/tracing closed/tools closed/vm
19965 Unpack 4XtA5w5gIKha0vmSyHRuDuEvbTdwvfSOdkfCnbfa9Go.pack testout.jar
5415 /opt/jprt/dist/jprt.jar startclient -instancename P1
21952 com.sun.javatest.regtest.Agent -allowSetSecurityManager -port 59824
21948 /opt/jprt/products/P1/jtreg4.1-latest/jtreg/lib/jtreg.jar -agentvm -d64 -server -Duser.home=/tmp/jprt/P1/165924.albatem -Djava.io.tmpdir=/tmp/jprt/P1/165924.albatem/io/solaris_sparcv9-product-c2-jdk_tools2 -vmoption:-d64 -vmoption:-server -vmoption:-Duser.home=/tmp/jprt/P1/165924.albatem -vmoption:-Djava.io.tmpdir=/tmp/jprt/P1/165924.albatem/io/solaris_sparcv9-product-c2-jdk_tools2 -a -ea -esa -v:fail,error,time -retain:fail,error -ignore:quiet -timeoutFactor:4 -r:/tmp/jprt/P1/165924.albatem/source/jdk/test/../build/solaris-sparcv9/testoutput/jdk_tools2/JTreport -w:/tmp/jprt/P1/165924.albatem/source/jdk/test/../build/solaris-sparcv9/testoutput/jdk_tools2/JTwork -jdk:/tmp/jprt/P1/165924.albatem/testproduct/solaris_sparcv9_5.10-product -exclude:/tmp/jprt/P1/165924.albatem/source/jdk/test/../build/solaris-sparcv9/testoutput/jdk_tools2/excludelist.txt com/sun/tools sun/jvmstat sun/tools tools vm com/sun/servicetag com/sun/tracing closed/tools closed/vm
22374 sun.tools.jcmd.JCmd -l
19965 Unpack 4XtA5w5gIKha0vmSyHRuDuEvbTdwvfSOdkfCnbfa9Go.pack testout.jar
5415 /opt/jprt/dist/jprt.jar startclient -instancename P1
STDERR:

TEST RESULT: Failed. Execution failed: exit code 1
--------------------------------------------------