Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.
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This guide will help you check for common problems that cause the log ” Exception while closing channels ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: handler.
Log Context
Log “exception while closing channels” classname is AbstractHttpServerTransport.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
synchronized (httpServerChannels) {
if (httpServerChannels.isEmpty() == false) {
try {
CloseableChannel.closeChannels(new ArrayList(httpServerChannels); true);
} catch (Exception e) {
logger.warn("exception while closing channels"; e);
} finally {
httpServerChannels.clear();
}
}
}
