[KARAF-2378] Shell:exec doesn't show output for commands that execute too quickly

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0.RC1
• Fix Version/s: 2.3.3, 2.4.0, 3.0.0
• Component/s: karaf

Environment

Ubuntu 13.04, jdk 7

• Assignee: Freeman Yue Fang
• Reporter: Christophe Vanfleteren
• Created: 08/Jul/13 20:14
• Updated: 15/Sep/18 16:35
• Resolved: 11/Jul/13 07:29

Description

When using shell:exec, you don't see any output when the command you're executing is executing too fast.

karaf@root()> shell:exec ls
bin
data
demos
deploy
etc
instances
lib
LICENSE
lock
NOTICE
README
RELEASE-NOTES
system
karaf@root()> shell:exec ls
karaf@root()> 

For example, using shell:exec ls doesn't return anything, but shell:exec du / does.

Although, almost every time you first use shell:exec, you do get output on the console. If I add a Thread.sleep right before the p.waitFor in, it also consistently works.

The cause must be related to the PumpStreamHandler.