[
https://issues.apache.org/jira/browse/HADOOP-16453?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Lisheng Sun updated HADOOP-16453:
---------------------------------
Description:
When there is no String Constructor for the exception, we Log a Trace Message.
Given that log and throw is not a very good approach I think the right thing
would be to just not log it at all as HADOOP-16431.
{code:java}
private static <T extends IOException> T wrapWithMessage(
T exception, String msg) throws T {
Class<? extends Throwable> clazz = exception.getClass();
try {
Constructor<? extends Throwable> ctor = clazz.getConstructor(String.class);
Throwable t = ctor.newInstance(msg);
return (T)(t.initCause(exception));
} catch (Throwable e) {
LOG.trace("Unable to wrap exception of type {}: it has no (String) "
+ "constructor", clazz, e);
throw exception;
}
}
{code}
was:
private static <T extends IOException> T wrapWithMessage(
T exception, String msg) { Class<? extends Throwable> clazz =
exception.getClass(); try {
Constructor<? extends Throwable> ctor =
clazz.getConstructor(String.class);
Throwable t = ctor.newInstance(msg); return (T) (t.initCause(exception));
} catch (Throwable e) {
LOG.trace("Unable to wrap exception of type " +
clazz + ": it has no (String) constructor", e); return
exception;
}
}
> Remove useless trace log in NetUtils.java
> -----------------------------------------
>
> Key: HADOOP-16453
> URL: https://issues.apache.org/jira/browse/HADOOP-16453
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Lisheng Sun
> Assignee: Lisheng Sun
> Priority: Minor
>
> When there is no String Constructor for the exception, we Log a Trace
> Message. Given that log and throw is not a very good approach I think the
> right thing would be to just not log it at all as HADOOP-16431.
> {code:java}
> private static <T extends IOException> T wrapWithMessage(
> T exception, String msg) throws T {
> Class<? extends Throwable> clazz = exception.getClass();
> try {
> Constructor<? extends Throwable> ctor =
> clazz.getConstructor(String.class);
> Throwable t = ctor.newInstance(msg);
> return (T)(t.initCause(exception));
> } catch (Throwable e) {
> LOG.trace("Unable to wrap exception of type {}: it has no (String) "
> + "constructor", clazz, e);
> throw exception;
> }
> }
> {code}
>
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