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Título
How to deal with "java.net.UnknownHostException" errors -
Descripción
The logs for a particular Foglight component show an error similar to the following:
java.net.UnknownHostException: XXXX.XXXX.XXXX
at java.net.InetAddress.getAllByName0(Unknown Source)
at java.net.InetAddress.getAllByName(Unknown Source)
at java.net.InetAddress.getAllByName(Unknown Source)
at java.net.InetAddress.getByName(Unknown Source)where XXXX.XXXX.XXXX refers to a host that this component is configured to connect to
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Causa
This error means that the host where the component is deployed cannot do a name lookup for XXXX.XXXX.XXXX.
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Resolución
WORKAROUND 1
If the host where the component is deployed is configured to use DNS make sure that the host referred to by XXXX.XXXX.XXXX is in the DNS. If not get the local DNS administrators to add it.
WORKAROUND 2
Add an entry for the XXXX.XXXX.XXXX host to the component host hosts file.
WORKAROUND 3
For the Active Directory (AD) agent make sure Override Naming Validation to True in the agent properties