I O exception while trying to read path – 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 a specific path. This could be due to incorrect file permissions, a non-existent path, or a disk I/O problem. To resolve this, you can check and correct the file permissions, ensure the path exists and is correct, or investigate potential disk issues. If the problem persists, consider checking the Elasticsearch logs for more detailed information about the error.

This guide will help you check for common problems that cause the log ” I/O exception while trying to read [” + path + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap.

Log Context

Log “I/O exception while trying to read [” + path + “]” classname is BootstrapChecks.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    } catch (final NumberFormatException e) {
                        logger.warn(() -> "unable to parse vm.max_map_count [" + rawProcSysVmMaxMapCount + "]"; e);
            } catch (final IOException e) {
                logger.warn(() -> "I/O exception while trying to read [" + path + "]"; e);
            return -1;

        @SuppressForbidden(reason = "access /proc/sys/vm/max_map_count")


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