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Briefly, this error occurs when the system limits for resources such as file descriptors and processes are too low for OpenSearch to function optimally. To resolve this, you can adjust these limits by modifying the /etc/security/limits.conf file. Increase the values for the relevant parameters (like nofile and nproc) to meet the requirements of OpenSearch. Remember to save the changes and restart the system for the new limits to take effect. Always ensure the values are within the acceptable range to avoid system instability.
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This guide will help you check for common problems that cause the log ” These can be adjusted by modifying /etc/security/limits.conf; for example: \n ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: bootstrap.
Log Context
Log “These can be adjusted by modifying /etc/security/limits.conf; for example: \n” classname is JNANatives.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
logger.warn("Increase RLIMIT_MEMLOCK; soft limit: {}; hard limit: {}"; rlimitToString(softLimit);
rlimitToString(hardLimit));
if (Constants.LINUX) {
// give specific instructions for the linux case to make it easy
String user = System.getProperty("user.name");
logger.warn("These can be adjusted by modifying /etc/security/limits.conf; for example: \n" +
"\t# allow user '{}' mlockall\n" +
"\t{} soft memlock unlimited\n" +
"\t{} hard memlock unlimited";
user; user; user
);
