Briefly, this error occurs when a single channel in Elasticsearch is used for multiple requests simultaneously, which is not allowed. This can happen due to a bug or a misconfiguration in the system. To resolve this issue, you can try the following: 1) Upgrade Elasticsearch to the latest version as it may contain bug fixes. 2) Check your system’s configuration to ensure that each request is using its own channel. 3) Monitor your system’s performance to identify any unusual patterns that may be causing this error.
This guide will help you check for common problems that cause the log ” channel handling [{}] reused ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: rest.
Log Context
Log “channel handling [{}] reused” classname is AbstractRestChannel.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
public final BytesStream bytesOutput() {
if (bytesOut != null) {
// fallback in case of encountering a bug; release the existing buffer if any (to avoid leaking memory) and acquire a new one
// to send out an error response
assert false : "getting here is always a bug";
logger.error("channel handling [{}] reused"; request.rawPath());
releaseOutputBuffer();
}
bytesOut = newBytesOutput();
return bytesOut;
}
