dmvk commented on a change in pull request #16884:
URL: https://github.com/apache/flink/pull/16884#discussion_r692094697
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/disk/iomanager/IOManager.java
##########
@@ -54,6 +56,14 @@
protected IOManager(String[] tempDirs) {
this.fileChannelManager =
new
FileChannelManagerImpl(Preconditions.checkNotNull(tempDirs), DIR_NAME_PREFIX);
+ if (LOG.isInfoEnabled()) {
+ LOG.info(
+ "Created a new {} for spilling of task related data to
disk (joins, sorting, ...). Used directories: {}.",
+ FileChannelManager.class.getSimpleName(),
+ Arrays.stream(fileChannelManager.getPaths())
+ .map(File::getAbsolutePath)
+ .collect(Collectors.joining(", ")));
Review comment:
I'd strongly recommend against multi-line log messages, because this
would affect logging infrastructure of many users.
For tools such as fluentd, filebeat, logstash, that rely on log parsing,
this would require special handling [1]. One special case of multiline log are
stacktraces, but these have a well defined format and are usually supported out
of the box.
[1]
https://www.elastic.co/guide/en/beats/filebeat/current/multiline-examples.html#multiline-examples
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