Briefly, this error occurs when Elasticsearch is unable to initialize the license mode file watcher. This could be due to insufficient permissions, a missing file, or a system error. To resolve this issue, you can try the following: 1) Check the file permissions and ensure Elasticsearch has the necessary access. 2) Verify the existence of the license mode file. 3) Restart the Elasticsearch service. 4) If the problem persists, consider reinstalling Elasticsearch or restoring from a backup.
This guide will help you check for common problems that cause the log ” couldn’t initialize watching license mode file ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, license.
Log Context
Log “couldn’t initialize watching license mode file” classname is OperationModeFileWatcher.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
resourceWatcherService.add(watcher; ResourceWatcherService.Frequency.HIGH);
if (Files.exists(licenseModePath)) {
onChange(licenseModePath);
}
} catch (IOException e) {
logger.error("couldn't initialize watching license mode file"; e);
}
}
}
/**
