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https://issues.apache.org/jira/browse/IMPALA-14155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17979244#comment-17979244
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Quanlong Huang commented on IMPALA-14155:
-----------------------------------------
Another Java log that I saw is from JvmPauseMonitor.java
{code:java}
I20250616 06:53:54.435485 660059 JvmPauseMonitor.java:209] Detected pause in
JVM or host machine (eg GC): pause of approximately 7953ms{code}
This class uses the Logger from log4j directly:
{code:java}
import org.apache.log4j.Logger;
...
public class JvmPauseMonitor {
private static final Logger LOG =
Logger.getLogger(JvmPauseMonitor.class);{code}
Most of the Java classes use Logger of slf4j and all of their logs are missing:
{code:java}
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
...
public class Frontend {
private final static Logger LOG =
LoggerFactory.getLogger(Frontend.class);{code}
Debugging the code found that the Logger is somehow initialized as a
org.slf4j.helpers.NOPLogger(NOP). I think that explains why their logs are
missing. Need to find the cause how this happens.
> Missing Java logs when running on Apache Hive3
> ----------------------------------------------
>
> Key: IMPALA-14155
> URL: https://issues.apache.org/jira/browse/IMPALA-14155
> Project: IMPALA
> Issue Type: Bug
> Reporter: Quanlong Huang
> Priority: Major
>
> When building on Apache Hive 3.1.3 (i.e. USE_APACHE_COMPONENTS=true),
> catalogd and impalad logs are missing almost all the Java logs. The only log
> of the Java codes is
> {code}
> I20250616 00:31:31.442186 626874 GlogAppender.java:140] Logging
> (re)initialized. Impala: VLOG, All other: INFO{code}
> Some tests failed due to this, e.g.
> tests/custom_cluster/test_local_catalog.py::TestLocalCatalogCompactUpdates::test_restart_catalogd
> Note that C++ logs are shown as expected.
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