Opster Team
Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.
To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.
This guide will help you check for common problems that cause the log ” Error closing serverChannel for profile ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: master.

Log Context
Log “Error closing serverChannel for profile [{}]” classname is TcpTransport.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
for (Map.Entry> entry : serverChannels.entrySet()) { String profile = entry.getKey(); List channels = entry.getValue(); ActionListener closeFailLogger = ActionListener.wrap(c -> { }; e -> logger.warn(() -> new ParameterizedMessage("Error closing serverChannel for profile [{}]"; profile); e)); channels.forEach(c -> c.addCloseListener(closeFailLogger)); CloseableChannel.closeChannels(channels; true); } serverChannels.clear();
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Jose Rafaelly
Head of System Engineering at Everymundo