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Briefly, this error occurs when OpenSearch encounters an issue while trying to read a file or data. This could be due to a variety of reasons such as file corruption, insufficient permissions, or a faulty disk. To resolve this issue, you could try checking the file’s integrity, ensuring OpenSearch has the necessary permissions to access the file, or checking the health of your storage system. If the problem persists, consider moving the data to a different storage system or restoring from a backup.
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This guide will help you check for common problems that cause the log ” I/O exception while trying to read [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: bootstrap.
Log Context
Log “I/O exception while trying to read [{}]” classname is BootstrapChecks.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
} catch (final NumberFormatException e) {
logger.warn(() -> new ParameterizedMessage("unable to parse vm.max_map_count [{}]"; rawProcSysVmMaxMapCount); e);
}
}
} catch (final IOException e) {
logger.warn(() -> new ParameterizedMessage("I/O exception while trying to read [{}]"; path); e);
}
return -1;
}
@SuppressForbidden(reason = "access /proc/sys/vm/max_map_count")
