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Posted to common-issues@hadoop.apache.org by "Wei-Chiu Chuang (JIRA)" <ji...@apache.org> on 2015/12/16 23:31:46 UTC
[jira] [Updated] (HADOOP-12652) Error message in
Shell.checkIsBashSupported is misleading
[ https://issues.apache.org/jira/browse/HADOOP-12652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wei-Chiu Chuang updated HADOOP-12652:
-------------------------------------
Labels: shell supportability (was: )
> Error message in Shell.checkIsBashSupported is misleading
> ---------------------------------------------------------
>
> Key: HADOOP-12652
> URL: https://issues.apache.org/jira/browse/HADOOP-12652
> Project: Hadoop Common
> Issue Type: Bug
> Components: util
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Labels: shell, supportability
>
> Shell.checkIsBashSupported() creates a bash shell command to verify if the system supports bash. However, its error message is misleading, and the logic should be updated.
> If the shell command throws an IOException, it does not imply the bash did not run successfully. If the shell command process was interrupted, its internal logic throws an InterruptedIOException, which is a subclass of IOException.
> {code:title=Shell.checkIsBashSupported|borderStyle=solid}
> ShellCommandExecutor shexec;
> boolean supported = true;
> try {
> String[] args = {"bash", "-c", "echo 1000"};
> shexec = new ShellCommandExecutor(args);
> shexec.execute();
> } catch (IOException ioe) {
> LOG.warn("Bash is not supported by the OS", ioe);
> supported = false;
> }
> {code}
> An example of it appeared in a recent jenkins job
> https://builds.apache.org/job/PreCommit-HADOOP-Build/8257/testReport/org.apache.hadoop.ipc/TestRPCWaitForProxy/testInterruptedWaitForProxy/
> {noformat}
> 2015-12-16 21:31:53,797 WARN util.Shell (Shell.java:checkIsBashSupported(718)) - Bash is not supported by the OS
> java.io.InterruptedIOException: java.lang.InterruptedException
> at org.apache.hadoop.util.Shell.runCommand(Shell.java:930)
> at org.apache.hadoop.util.Shell.run(Shell.java:838)
> at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:1117)
> at org.apache.hadoop.util.Shell.checkIsBashSupported(Shell.java:716)
> at org.apache.hadoop.util.Shell.<clinit>(Shell.java:705)
> at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:79)
> at org.apache.hadoop.security.SecurityUtil.getAuthenticationMethod(SecurityUtil.java:639)
> at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:273)
> at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:261)
> at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:803)
> at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:773)
> at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:646)
> at org.apache.hadoop.ipc.RPC.waitForProtocolProxy(RPC.java:397)
> at org.apache.hadoop.ipc.RPC.waitForProtocolProxy(RPC.java:350)
> at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:330)
> at org.apache.hadoop.ipc.TestRPCWaitForProxy$RpcThread.run(TestRPCWaitForProxy.java:115)
> Caused by: java.lang.InterruptedException
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:503)
> at java.lang.UNIXProcess.waitFor(UNIXProcess.java:264)
> at org.apache.hadoop.util.Shell.runCommand(Shell.java:920)
> ... 15 more
> {noformat}
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