Re: [PATCH lttng-tools] fix: systematically set the logger level to prevent unexpected level inheritance

Re: [PATCH lttng-tools] fix: systematically set the logger level to prevent unexpected level inheritance

[Mathieu Desnoyers]

----- On May 26, 2016, at 6:14 PM, Jonathan Rajotte jonathan.rajotte-julien@efficios.com wrote:

> BSF or other jars can ship with log4j.properties file embedded. This causes
> problem when launching an application with a general class path (e.g
> /usr/share/java/*) since log4j will look for a configuration file in all loaded
> jars. If any contains directive for the root logger it will affect any logger
> with no level who are directly under the root logger. This could result in an
> unexpected behaviour (e.g no events triggered et.).
> 

Perhaps prefix the line below with "Link: "

> https://issues.apache.org/jira/browse/BSF-24

missing newline.

> Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
> ---
> tests/regression/ust/java-log4j/JTestLTTng.java | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
> 
> diff --git a/tests/regression/ust/java-log4j/JTestLTTng.java
> b/tests/regression/ust/java-log4j/JTestLTTng.java
> index 64a471b..ef97b34 100644
> --- a/tests/regression/ust/java-log4j/JTestLTTng.java
> +++ b/tests/regression/ust/java-log4j/JTestLTTng.java
> @@ -23,6 +23,7 @@ import java.lang.Integer;
> import org.apache.log4j.Appender;
> import org.apache.log4j.BasicConfigurator;
> import org.apache.log4j.Logger;
> +import org.apache.log4j.Level;
> import org.lttng.ust.agent.log4j.LttngLogAppender;
> 
> public class JTestLTTng {
> @@ -40,6 +41,17 @@ public class JTestLTTng {
> 		Logger lttng = Logger.getLogger("log4j-event");
> 		Logger lttng2 = Logger.getLogger("log4j-event-2");
> 

Comments start with:

 /*
  * 

Other than those nits, lgtm.

Thanks,

Mathieu

> +		/* Set lowest level to make sure all event levels are logged.
> +		 * Any jar can override the default log4j rootLogger level
> +		 * and a logger with no explicit level defaults to the non-null
> +		 * parent level. Events could be ignored if the inherited value
> +		 * is to low.
> +		 * e.g BSF  -> https://issues.apache.org/jira/browse/BSF-24
> +		 */
> +
> +		lttng.setLevel(Level.ALL);
> +		lttng2.setLevel(Level.ALL);
> +
> 		int nrIter = Integer.parseInt(args[0]);
> 		int waitTime = Integer.parseInt(args[1]);
> 		int fire_debug_tp = 0;
> --
> 2.7.4
> 
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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[PATCH lttng-tools] fix: systematically set the logger level to prevent unexpected level inheritance

[Jonathan Rajotte]

BSF or other jars can ship with log4j.properties file embedded. This causes
problem when launching an application with a general class path (e.g
/usr/share/java/*) since log4j will look for a configuration file in all loaded
jars. If any contains directive for the root logger it will affect any logger
with no level who are directly under the root logger. This could result in an
unexpected behaviour (e.g no events triggered et.).

https://issues.apache.org/jira/browse/BSF-24
Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
---
 tests/regression/ust/java-log4j/JTestLTTng.java | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tests/regression/ust/java-log4j/JTestLTTng.java b/tests/regression/ust/java-log4j/JTestLTTng.java
index 64a471b..ef97b34 100644
--- a/tests/regression/ust/java-log4j/JTestLTTng.java
+++ b/tests/regression/ust/java-log4j/JTestLTTng.java
@@ -23,6 +23,7 @@ import java.lang.Integer;
 import org.apache.log4j.Appender;
 import org.apache.log4j.BasicConfigurator;
 import org.apache.log4j.Logger;
+import org.apache.log4j.Level;
 import org.lttng.ust.agent.log4j.LttngLogAppender;
 
 public class JTestLTTng {
@@ -40,6 +41,17 @@ public class JTestLTTng {
 		Logger lttng = Logger.getLogger("log4j-event");
 		Logger lttng2 = Logger.getLogger("log4j-event-2");
 
+		/* Set lowest level to make sure all event levels are logged.
+		 * Any jar can override the default log4j rootLogger level
+		 * and a logger with no explicit level defaults to the non-null
+		 * parent level. Events could be ignored if the inherited value
+		 * is to low.
+		 * e.g BSF  -> https://issues.apache.org/jira/browse/BSF-24
+		 */
+
+		lttng.setLevel(Level.ALL);
+		lttng2.setLevel(Level.ALL);
+
 		int nrIter = Integer.parseInt(args[0]);
 		int waitTime = Integer.parseInt(args[1]);
 		int fire_debug_tp = 0;
-- 
2.7.4

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