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From "Aled Sage (JIRA)" <>
Subject [jira] [Commented] (BROOKLYN-106) ssh command hangs (gettin stdout/stderr) for vcloud-director
Date Tue, 13 Jan 2015 15:39:34 GMT


Aled Sage commented on BROOKLYN-106:

Eureka! The problem was in our use of the VMware Java SDK for reconfiguring the Edge Gateway.

Our approach was to get the "edge gateway service configuration", modify the part of it that
related to the NAT service, and then call `edgeGateway.configureServices(gatewayFeatures)`
will all the original features. 

The reason that seemed like a good idea was that the API is delicate! If you were to create
a `NatServiceType` object directly and populate it with just your delta, then it would override
the existing configuration for all fields that you had left as the defaults. For example.
it might set `isEnabled` to false (which is the default in a Java field), thus disabling the
NAT service in a way that is invisible in the UI but accessible through the API. Therefore,
uploading the entire configuration seemed like a better bet.

Changing this to just upload a `new ObjectFactory().createNetworkService(natService)` (i.e.
creating it from the downloaded natService object) means we don't tell it to reconfigure the
other services (GatewayDhcpServiceType, FirewallServiceType and GatewayIpsecVpnServiceType).
Doing that - even though the configuration was identical - meant our ssh commands hung.

> ssh command hangs (gettin stdout/stderr) for vcloud-director
> ------------------------------------------------------------
>                 Key: BROOKLYN-106
>                 URL:
>             Project: Brooklyn
>          Issue Type: Bug
>    Affects Versions: 0.7.0-SNAPSHOT
>            Reporter: Aled Sage
>            Assignee: Aled Sage
>         Attachments: debug.log.tgz, jstack.txt, messages.tgz, ssh-stdout.txt
> When deploying Tomcat to VMware's vcloud-air, to a CentOS 6.4 VM, when installing Java
it hangs!
> The Brooklyn web-console shows that it is still waiting for a result from the ssh command
(which executed `sudo -E -n -S -- yum -y --nogpgcheck install java-1.7.0-openjdk-devel`).
> However, when logging into the VM I can see that the `yum` command has finished, and
the /var/log/messages (attached) shows that the install completed.
> This fails repeatedly. It used to pass!
> The stdout is at 32040 bytes. The last few lines of the stdout (as shown in the web-console)
> {noformat}
>   Installing : libtasn1-2.3-6.el6_5.x86_64                                50/56
>   Installing : gnutls-2.8.5-14.el6_5.x86_64                               51/56
>   Installing : 1:cups-libs-1.4.2-67.el6.x86_64                            52/56
> {noformat}
> Could there be some buffer set to 32K, so it's stuck not reading the rest of the stdout
(but `SshjToolPerformanceTest.testConsecutiveBigStdoutCommands` passes)?
> Why else would our ssh command be stuck, not returning?

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