Error while reading – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch encounters an issue while trying to read data. This could be due to a corrupted index, insufficient permissions, or a network connectivity issue. To resolve this, you can try to restore the index from a backup, check and adjust the file permissions, or troubleshoot the network connection. Additionally, ensure that the Elasticsearch cluster has enough resources (CPU, memory, disk space) to operate efficiently.

This guide will help you check for common problems that cause the log ” error while reading ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap.

Log Context

Log “error while reading ” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                while ((line = br.readLine()) != null) {
                    // since we do not expect native controllers to ever write to stdout/stderr; we always log at warn level
            } catch (IOException e) {
                logger.error("error while reading " + streamName; e);
        }; loggerName + "-pump");