Briefly, this error occurs when the system limits for resources utilized by Elasticsearch, such as file descriptors or memory, are too low. These limits are defined in the ‘etc/security/limits.conf’ file. To resolve this issue, you can increase the limits in this file. For instance, you can raise the number of open files allowed for the Elasticsearch user. Also, ensure that the Elasticsearch process has permission to use these limits. Restart Elasticsearch after making these changes. Always be cautious and set limits that your system can handle to avoid resource exhaustion.
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 Elasticsearch 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 Elasticsearch 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
);
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