Marcono1234 created YARN-10644:
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Summary: ProcfsBasedProcessTree.ADDRESS_PATTERN is misleading and
possibly incorrect
Key: YARN-10644
URL: https://issues.apache.org/jira/browse/YARN-10644
Project: Hadoop YARN
Issue Type: Bug
Reporter: Marcono1234
The regex pattern of field
{{org.apache.hadoop.yarn.util.ProcfsBasedProcessTree.ADDRESS_PATTERN}} contains
the follow character class twice:
{code}
[[a-f]|(0-9)]*
{code}
The way it is written suggests the author might wanted to match with this only
{{a-f}} or {{0-9}}. However character classes allow any of the contained
characters (or ranges), therefore this additionally matches {{|}}, {{(}} and
{{)}} as well which might not have been intended:
{code}
"|()".matches("[[a-f]|(0-9)]*")
{code}
If the intention was to only allow {{a-f}} or {{0-9}}, it should be written as:
{code}
[a-f0-9]
{code}
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