[ 
https://issues.apache.org/jira/browse/HDFS-12494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16192531#comment-16192531
 ] 

Hadoop QA commented on HDFS-12494:
----------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
14s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:red}-1{color} | {color:red} test4tests {color} | {color:red}  0m  
0s{color} | {color:red} The patch doesn't appear to include any new or modified 
tests. Please justify why no new tests are needed for this patch. Also please 
list what manual steps were performed to verify this patch. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 13m 
36s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
17s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
13s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
22m 44s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
10s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} cc {color} | {color:green}  0m 
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
10s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
10m  6s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
35s{color} | {color:green} hadoop-hdfs-native-client in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
18s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 35m 15s{color} | 
{color:black} {color} |
\\
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:71bbb86 |
| JIRA Issue | HDFS-12494 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12890481/HDFS-12494.001.patch |
| Optional Tests |  asflicense  compile  cc  mvnsite  javac  unit  |
| uname | Linux dc3c5a38e4d3 3.13.0-119-generic #166-Ubuntu SMP Wed May 3 
12:18:55 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | trunk / f702c95 |
| Default Java | 1.8.0_144 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/21529/testReport/ |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-native-client U: 
hadoop-hdfs-project/hadoop-hdfs-native-client |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/21529/console |
| Powered by | Apache Yetus 0.6.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> libhdfs SIGSEGV in setTLSExceptionStrings
> -----------------------------------------
>
>                 Key: HDFS-12494
>                 URL: https://issues.apache.org/jira/browse/HDFS-12494
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: libhdfs
>    Affects Versions: 3.0.0-alpha4
>            Reporter: John Zhuge
>            Assignee: John Zhuge
>         Attachments: HDFS-12494.001.patch
>
>
> libhdfs application crashes when CLASSPATH is set but not set properly. It 
> uses wildcard in this case.
> {noformat}
> $ export CLASSPATH=$(hadoop classpath)
> $ pwd
> /Users/jzhuge/hadoop2/hadoop-hdfs-project/hadoop-hdfs/target/native
> $ ./test_libhdfs_ops
> #
> # A fatal error has been detected by the Java Runtime Environment:
> #
> #  SIGSEGV (0xb) at pc=0x00000001052968f7, pid=14147, tid=775
> #
> # JRE version: Java(TM) SE Runtime Environment (7.0_79-b15) (build 
> 1.7.0_79-b15)
> # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.79-b02 mixed mode bsd-amd64 
> compressed oops)
> # Problematic frame:
> # C  [libhdfs.0.0.0.dylib+0x38f7]  setTLSExceptionStrings+0x47
> #
> # Core dump written. Default location: /cores/core or core.14147
> #
> # An error report file with more information is saved as:
> # 
> /Users/jzhuge/hadoop2/hadoop-hdfs-project/hadoop-hdfs/target/native/hs_err_pid14147.log
> #
> #
> # If you would like to submit a bug report, please visit:
> #   http://bugreport.java.com/bugreport/crash.jsp
> # The crash happened outside the Java Virtual Machine in native code.
> # See problematic frame for where to report the bug.
> #
> Abort trap: 6 (core dumped)
> [jzhuge@jzhuge-MBP native]((be32925fff5...) *+)$ lldb -c /cores/core.14147
> (lldb) target create --core "/cores/core.14147"
> warning: (x86_64) /cores/core.14147 load command 549 LC_SEGMENT_64 has a 
> fileoff + filesize (0x14627f000) that extends beyond the end of the file 
> (0x14627e000), the segment will be truncated to match
> warning: (x86_64) /cores/core.14147 load command 550 LC_SEGMENT_64 has a 
> fileoff (0x14627f000) that extends beyond the end of the file (0x14627e000), 
> ignoring this section
> Core file '/cores/core.14147' (x86_64) was loaded.
> (lldb) bt
> * thread #1, stop reason = signal SIGSTOP
>   * frame #0: 0x00007fffcf89ad42 libsystem_kernel.dylib`__pthread_kill + 10
>     frame #1: 0x00007fffcf988457 libsystem_pthread.dylib`pthread_kill + 90
>     frame #2: 0x00007fffcf800420 libsystem_c.dylib`abort + 129
>     frame #3: 0x00000001056cd5fb libjvm.dylib`os::abort(bool) + 25
>     frame #4: 0x00000001057d98fc libjvm.dylib`VMError::report_and_die() + 2308
>     frame #5: 0x00000001056cefb5 libjvm.dylib`JVM_handle_bsd_signal + 1083
>     frame #6: 0x00007fffcf97bb3a libsystem_platform.dylib`_sigtramp + 26
>     frame #7: 0x00000001052968f8 
> libhdfs.0.0.0.dylib`setTLSExceptionStrings(rootCause=0x0000000000000000, 
> stackTrace=0x0000000000000000) at jni_helper.c:589 [opt]
>     frame #8: 0x00000001052954f0 
> libhdfs.0.0.0.dylib`printExceptionAndFreeV(env=0x00007ffaff0019e8, 
> exc=0x00007ffafec04140, noPrintFlags=<unavailable>, fmt="loadFileSystems", 
> ap=<unavailable>) at exception.c:183 [opt]
>     frame #9: 0x00000001052956bb 
> libhdfs.0.0.0.dylib`printExceptionAndFree(env=<unavailable>, 
> exc=<unavailable>, noPrintFlags=<unavailable>, fmt=<unavailable>) at 
> exception.c:213 [opt]
>     frame #10: 0x00000001052967f4 libhdfs.0.0.0.dylib`getJNIEnv [inlined] 
> getGlobalJNIEnv at jni_helper.c:463 [opt]
>     frame #11: 0x000000010529664f libhdfs.0.0.0.dylib`getJNIEnv at 
> jni_helper.c:528 [opt]
>     frame #12: 0x00000001052975eb 
> libhdfs.0.0.0.dylib`hdfsBuilderConnect(bld=0x00007ffafed00000) at hdfs.c:693 
> [opt]
>     frame #13: 0x000000010528be30 test_libhdfs_ops`main(argc=<unavailable>, 
> argv=<unavailable>) at test_libhdfs_ops.c:91 [opt]
>     frame #14: 0x00007fffcf76c235 libdyld.dylib`start + 1
> (lldb) f 10
> libhdfs.0.0.0.dylib was compiled with optimization - stepping may behave 
> oddly; variables may not be available.
> frame #10: 0x00000001052967f4 libhdfs.0.0.0.dylib`getJNIEnv [inlined] 
> getGlobalJNIEnv at jni_helper.c:463 [opt]
>    460                                 "org/apache/hadoop/fs/FileSystem",
>    461                                 "loadFileSystems", "()V");
>    462                if (jthr) {
> -> 463                    printExceptionAndFree(env, jthr, PRINT_EXC_ALL, 
> "loadFileSystems");
>    464                }
>    465            }
>    466            else {
> (lldb) f 7
> frame #7: 0x00000001052968f8 
> libhdfs.0.0.0.dylib`setTLSExceptionStrings(rootCause=0x0000000000000000, 
> stackTrace=0x0000000000000000) at jni_helper.c:589 [opt]
>    586                mutexUnlock(&jvmMutex);
>    587            }
>    588
> -> 589            free(state->lastExceptionRootCause);
>    590            free(state->lastExceptionStackTrace);
>    591            state->lastExceptionRootCause = (char*)rootCause;
>    592            state->lastExceptionStackTrace = (char*)stackTrace;
> (lldb) p state
> (ThreadLocalState *) $0 = 0x0000000000000000
> {noformat}
> The correct way to set CLASSPATH is because libhdfs does not support wildcard 
> in CLASSPATH:
> {noformat}
> $ export CLASSPATH=$(hadoop classpath --glob)
> {noformat}
> Filed HDFS-12491 Support wildcard in CLASSPATH for libhdfs.



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