Andy Kurth created VCL-755:
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Summary: Add 'if defined' checks for all get_management_node_info
calls
Key: VCL-755
URL: https://issues.apache.org/jira/browse/VCL-755
Project: VCL
Issue Type: Bug
Components: vcld (backend)
Affects Versions: 2.3.2
Reporter: Andy Kurth
Fix For: 2.4
There are calls to get_management_node_info in utils.pm, DataStructure.pm, and
healthcheck.pm which do not check if a defined value is returned such as:
$identity_paths = get_management_node_info()->{keys};
There are cases where get_management_node_info will fail and return null such
as if a database connection cannot be obtained. When this happens and the
caller doesn't check for a defined value, the following unhandled error is
generated:
Can't use an undefined value as a HASH reference at
/usr/local/vcl/bin/../lib/VCL/utils.pm line 4017.
Every line containing "get_management_node_info()->" should be changed to first
retrieve the info, then check it, then access the hash reference value.
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