Philip Zeyliger created IMPALA-7441:
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Summary: Java logging happens before Java logging is configured,
leading to INFOs printed at ERROR
Key: IMPALA-7441
URL: https://issues.apache.org/jira/browse/IMPALA-7441
Project: IMPALA
Issue Type: Task
Reporter: Philip Zeyliger
The following is pretty surprising:
{code}
catalogd.....impala.log.ERROR.20180813-040536.9529:18/08/13 04:05:37 INFO
util.JvmPauseMonitor: Starting JVM pause monitor
{code}
Namely, we've got an INFO-level log message appearing in the ERROR file.
What's going on (I think) is that {{GlogAppender.Install()}} is being called
during the constructors of Frontend and Catalog objects:
{code}
$git grep GlogAppender.Install
fe/src/main/java/org/apache/impala/service/JniCatalog.java:
GlogAppender.Install(TLogLevel.values()[cfg.impala_log_lvl],
fe/src/main/java/org/apache/impala/service/JniFrontend.java:
GlogAppender.Install(TLogLevel.values()[cfg.impala_log_lvl],
{code}
Meanwhile, the pause monitor is initialized earlier:
{code}
$git grep -C5 JniUtil::InitJvmPauseMonitor | head
be/src/common/init.cc- if (!fs_cache_init_status.ok())
CLEAN_EXIT_WITH_ERROR(fs_cache_init_status.GetDetail());
be/src/common/init.cc-
be/src/common/init.cc- if (init_jvm) {
be/src/common/init.cc- ABORT_IF_ERROR(JniUtil::Init());
be/src/common/init.cc- InitJvmLoggingSupport();
be/src/common/init.cc: ABORT_IF_ERROR(JniUtil::InitJvmPauseMonitor());
be/src/common/init.cc- ZipUtil::InitJvm();
be/src/common/init.cc- }
{code}
This is largely cosmetic, but it was surprising to me.
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