This file contains the rules which govern how log messages are turned into events by the custom log4j appender that this role loads. It is in JSON format, and is composed of a list of rules. Every log message is evaluated against each of these rules in turn to decide whether or not to send an event for that message.
Each rule has some or all of the following fields:
Example:{\"alert\": false, \"rate\": 10, \"exceptiontype\": \"java.lang.StringIndexOutOfBoundsException\"}
This rule will send events to Cloudera Manager for every StringIndexOutOfBoundsException, up to a maximum of 10 every minute.
", "display_name": "Rules to Extract Events from Log Files", "name": "log_event_whitelist", "value": "{\n \"version\": \"0\",\n \"rules\": [\n {\"alert\": false, \"rate\": 1, \"periodminutes\": 1, \"threshold\":\"FATAL\"},\n {\"alert\": false, \"rate\": 0, \"threshold\":\"WARN\", \"content\": \".* is deprecated. Instead, use .*\"},\n {\"alert\": false, \"rate\": 0, \"threshold\":\"WARN\", \"content\": \".* is deprecated. Use .* instead\"},\n {\"alert\": false, \"rate\": 1, \"periodminutes\": 2, \"exceptiontype\": \".*\"},\n {\"alert\": false, \"rate\": 1, \"periodminutes\": 1, \"threshold\":\"WARN\"}\n ]\n}\n" }, { "desc": "These arguments will be passed as part of the Java command line. Commonly, garbage collection flags or extra debugging flags would be passed here.", "display_name": "Java Configuration Options for JobHistory Server", "name": "mr2_jobhistory_java_opts", "value": "-XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:-CMSConcurrentMTEnabled -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled" }, { "desc": "Whether or not periodic stacks collection is enabled.", "display_name": "Stacks Collection Enabled", "name": "stacks_collection_enabled", "value": "false" }, { "desc": "Kerberos principal used by the JobHistory Server roles.", "display_name": "Role-Specific Kerberos Principal", "name": "kerberos_role_princ_name", "value": "mapred" }, { "desc": "The health test thresholds of the number of file descriptors used. Specified as a percentage of file descriptor limit.", "display_name": "File Descriptor Monitoring Thresholds", "name": "jobhistory_fd_thresholds", "value": "{\"critical\":\"70.0\",\"warning\":\"50.0\"}" }, { "desc": "The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Heap Dump Directory Free Space Monitoring Absolute Thresholds setting is configured.", "display_name": "Heap Dump Directory Free Space Monitoring Percentage Thresholds", "name": "heap_dump_directory_free_space_percentage_thresholds", "value": "{\"critical\":\"never\",\"warning\":\"never\"}" }, { "desc": "Enables the health test that the JobHistory Server's process state is consistent with the role configuration", "display_name": "JobHistory Server Process Health Test", "name": "jobhistory_scm_health_enabled", "value": "true" }, { "desc": "The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory.", "display_name": "Heap Dump Directory Free Space Monitoring Absolute Thresholds", "name": "heap_dump_directory_free_space_absolute_thresholds", "value": "{\"critical\":\"5.36870912E9\",\"warning\":\"1.073741824E10\"}" }, { "desc": "For advanced use only, key-value pairs (one on each line) to be inserted into a role's environment. Applies to configurations of this role except client configuration.", "display_name": "JobHistory Server Environment Advanced Configuration Snippet (Safety Valve)", "name": "JOBHISTORY_role_env_safety_valve", "value": null }, { "desc": "The method used to collect stacks. The jstack option involves periodically running the jstack command against the role's daemon process. The servlet method is available for those roles that have an HTTP server endpoint exposing the current stacks traces of all threads. When the servlet method is selected, that HTTP endpoint is periodically scraped.", "display_name": "Stacks Collection Method", "name": "stacks_collection_method", "value": "jstack" }, { "desc": "When computing the overall JobHistory Server health, consider the host's health.", "display_name": "JobHistory Server Host Health Test", "name": "jobhistory_host_health_enabled", "value": "true" }, { "desc": "The maximum size, in megabytes, per log file for JobHistory Server logs. Typically used by log4j or logback.", "display_name": "JobHistory Server Max Log Size", "name": "max_log_size", "value": "200" }, { "desc": "The configured triggers for this role. This is a JSON formatted list of triggers. These triggers are evaluated as part as the health system. Every trigger expression is parsed, and if the trigger condition is met, the list of actions provided in the trigger expression is executed.
Each trigger has all of the following fields:
triggerName (mandatory) - The name of the trigger. This value must be unique for the specific role. triggerExpression (mandatory) - A tsquery expression representing the trigger. streamThreshold (optional) - The maximum number of streams that can satisfy a condition of a trigger before the condition fires. By default set to 0, and any stream returned causes the condition to fire. enabled (optional) - By default set to 'true'. If set to 'false', the trigger will not be evaluated.expressionEditorConfig (optional) - Metadata for the trigger editor. If present, the trigger should only be edited from the Edit Trigger page; editing the trigger here may lead to inconsistencies.For example, the following JSON formatted trigger configured for a DataNode fires if the DataNode has more than 1500 file-descriptors opened:
[{\"triggerName\": \"sample-trigger\",\n \"triggerExpression\": \"IF (SELECT fd_open WHERE roleName=$ROLENAME and last(fd_open) > 1500) DO health:bad\",\n \"streamThreshold\": 0, \"enabled\": \"true\"}]See the trigger rules documentation for more details on how to write triggers using tsquery.
The JSON format is evolving and may change in the future and, as a result, backward compatibility is not guaranteed between releases at this time.
", "display_name": "Role Triggers", "name": "role_triggers", "value": "[]" }, { "desc": "Directory where JobHistory Server will place its log files.", "display_name": "JobHistory Server Log Directory", "name": "mr2_jobhistory_log_dir", "value": "/var/log/hadoop-mapreduce" }, { "desc": "Time interval for history cleaner to check for files to delete. Files are only deleted if they are older than mapreduce.jobhistory.max-age-ms.", "display_name": "Job History Files Cleaner Interval", "name": "mapreduce_jobhistory_cleaner_interval", "value": "86400000" }, { "desc": "The period to review when computing the moving average of garbage collection time.", "display_name": "Garbage Collection Duration Monitoring Period", "name": "jobhistory_gc_duration_window", "value": "5" }, { "desc": "Soft memory limit to assign to this role, enforced by the Linux kernel. When the limit is reached, the kernel will reclaim pages charged to the process if and only if the host is facing memory pressure. If reclaiming fails, the kernel may kill the process. Both anonymous as well as page cache pages contribute to the limit. Use a value of -1 B to specify no limit. By default processes not managed by Cloudera Manager will have no limit.", "display_name": "Cgroup Memory Soft Limit", "name": "rm_memory_soft_limit", "value": "-1" }, { "desc": "The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory.", "display_name": "Log Directory Free Space Monitoring Absolute Thresholds", "name": "log_directory_free_space_absolute_thresholds", "value": "{\"critical\":\"5.36870912E9\",\"warning\":\"1.073741824E10\"}" }, { "desc": "Hard memory limit to assign to this role, enforced by the Linux kernel. When the limit is reached, the kernel will reclaim pages charged to the process. If reclaiming fails, the kernel may kill the process. Both anonymous as well as page cache pages contribute to the limit. Use a value of -1 B to specify no limit. By default processes not managed by Cloudera Manager will have no limit.", "display_name": "Cgroup Memory Hard Limit", "name": "rm_memory_hard_limit", "value": "-1" }, { "desc": "The health test thresholds on the swap memory usage of the process.", "display_name": "Process Swap Memory Thresholds", "name": "process_swap_memory_thresholds", "value": "{\"critical\":\"never\",\"warning\":\"any\"}" }, { "desc": "The period to review when computing unexpected exits.", "display_name": "Unexpected Exits Monitoring Period", "name": "unexpected_exits_window", "value": "5" }, { "desc": "Weight for the read I/O requests issued by this role. The greater the weight, the higher the priority of the requests when the host experiences I/O contention. Must be between 100 and 1000. Defaults to 1000 for processes not managed by Cloudera Manager.", "display_name": "Cgroup I/O Weight", "name": "rm_io_weight", "value": "500" }, { "desc": "The amount of stacks data that is retained. After the retention limit is reached, the oldest data is deleted.", "display_name": "Stacks Collection Data Retention", "name": "stacks_collection_data_retention", "value": "104857600" }, { "desc": "For advanced use only, a string to be inserted into yarn-site.xml for this role only.", "display_name": "JobHistory Server Advanced Configuration Snippet (Safety Valve) for yarn-site.xml", "name": "jobhistory_config_safety_valve", "value": null }, { "desc": "For advanced use only, a string to be inserted into log4j.properties for this role only.", "display_name": "JobHistory Server Logging Advanced Configuration Snippet (Safety Valve)", "name": "log4j_safety_valve", "value": null }, { "desc": "The frequency with which stacks are collected.", "display_name": "Stacks Collection Frequency", "name": "stacks_collection_frequency", "value": "5.0" }, { "desc": "The port of the MapReduce JobHistory Server administrative interface. Together with the host name of the JobHistory role forms the address.", "display_name": "MapReduce JobHistory Server Admin Interface Port", "name": "mapreduce_jobhistory_admin_address", "value": "10033" }, { "desc": "If configured, overrides the process soft and hard rlimits (also called ulimits) for file descriptors to the configured value.", "display_name": "Maximum Process File Descriptors", "name": "rlimit_fds", "value": null }, { "desc": "The group that the JobHistory Server process should run as.", "display_name": "System Group", "name": "history_process_groupname", "value": "hadoop" }, { "desc": "Job history files older than this time duration will deleted when the history cleaner runs.", "display_name": "Job History Files Maximum Age", "name": "mapreduce_jobhistory_max_age_ms", "value": "604800000" }, { "desc": "When set, Cloudera Manager will send alerts when the health of this role reaches the threshold specified by the EventServer setting eventserver_health_events_alert_threshold", "display_name": "Enable Health Alerts for this Role", "name": "enable_alerts", "value": "true" }, { "desc": "When set, this role's process is automatically (and transparently) restarted in the event of an unexpected failure.", "display_name": "Automatically Restart Process", "name": "process_auto_restart", "value": "false" }, { "desc": "When set, a SIGKILL signal is sent to the role process when java.lang.OutOfMemoryError is thrown.", "display_name": "Kill When Out of Memory", "name": "oom_sigkill_enabled", "value": "true" }, { "desc": "When set, generates heap dump file when java.lang.OutOfMemoryError is thrown.", "display_name": "Dump Heap When Out of Memory", "name": "oom_heap_dump_enabled", "value": "false" }, { "desc": "The minimum log level for JobHistory Server logs", "display_name": "JobHistory Server Logging Threshold", "name": "log_threshold", "value": "INFO" }, { "desc": "The health test thresholds for unexpected exits encountered within a recent period specified by the unexpected_exits_window configuration for the role.", "display_name": "Unexpected Exits Thresholds", "name": "unexpected_exits_thresholds", "value": "{\"critical\":\"any\",\"warning\":\"never\"}" }, { "desc": "The HTTP port of the MapReduce JobHistory Server web application. Together with the host name of the JobHistory role forms the address.", "display_name": "MapReduce JobHistory Web Application HTTP Port", "name": "mapreduce_jobhistory_webapp_address", "value": "19888" }, { "desc": "The root HDFS directory of the staging area for users' MR2 jobs; for example /user. The staging directories are always named after the user.", "display_name": "MapReduce ApplicationMaster Staging Root Directory", "name": "yarn_app_mapreduce_am_staging_dir", "value": "/user" }, { "desc": "Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server.", "display_name": "Web Metric Collection", "name": "jobhistory_web_metric_collection_enabled", "value": "true" }, { "desc": "When set, Cloudera Manager will send alerts when this entity's configuration changes.", "display_name": "Enable Configuration Change Alerts", "name": "enable_config_alerts", "value": "false" }, { "desc": "The port of the MapReduce JobHistory Server. Together with the hostname of the JobHistory role, forms the address. ", "display_name": "MapReduce JobHistory Server Port", "name": "mapreduce_jobhistory_address", "value": "10020" }, { "desc": "For advanced use only, a string to be inserted into mapred-site.xml for this role only.", "display_name": "JobHistory Server Advanced Configuration Snippet (Safety Valve) for mapred-site.xml", "name": "jobhistory_mapred_safety_valve", "value": null }, { "desc": "If enabled, the JobHistory Server binds to the wildcard address (\"0.0.0.0\") on all of its ports.", "display_name": "Bind JobHistory Server to Wildcard Address", "name": "yarn_jobhistory_bind_wildcard", "value": "false" }, { "desc": "The directory in which stacks logs are placed. If not set, stacks are logged into a stacks subdirectory of the role's log directory.", "display_name": "Stacks Collection Directory", "name": "stacks_collection_directory", "value": null }, { "desc": "The maximum number of rolled log files to keep for JobHistory Server logs. Typically used by log4j or logback.", "display_name": "JobHistory Server Maximum Log File Backups", "name": "max_log_backup_index", "value": "10" }, { "desc": "Number of CPU shares to assign to this role. The greater the number of shares, the larger the share of the host's CPUs that will be given to this role when the host experiences CPU contention. Must be between 2 and 262144. Defaults to 1024 for processes not managed by Cloudera Manager.", "display_name": "Cgroup CPU Shares", "name": "rm_cpu_shares", "value": "1024" }, { "desc": "Path to directory where heap dumps are generated when java.lang.OutOfMemoryError error is thrown. This directory is automatically created if it does not exist. If this directory already exists, role user must have write access to this directory. If this directory is shared among multiple roles, it should have 1777 permissions. The heap dump files are created with 600 permissions and are owned by the role user. The amount of free space in this directory should be greater than the maximum Java Process heap size configured for this role.", "display_name": "Heap Dump Directory", "name": "oom_heap_dump_dir", "value": "/tmp" }, { "desc": "The user that the JobHistory Server process should run as.", "display_name": "System User", "name": "history_process_username", "value": "mapred" }, { "desc": "The HTTPS port of the MapReduce JobHistory Server web application. Together with the host name of the JobHistory role forms the address.", "display_name": "MapReduce JobHistory Web Application HTTPS Port (SSL)", "name": "mapreduce_jobhistory_webapp_https_address", "value": "19890" }, { "desc": "The health test thresholds for the weighted average time spent in Java garbage collection. Specified as a percentage of elapsed wall clock time.", "display_name": "Garbage Collection Duration Thresholds", "name": "jobhistory_gc_duration_thresholds", "value": "{\"critical\":\"60.0\",\"warning\":\"30.0\"}" }, { "desc": "The health test thresholds on the duration of the metrics request to the web server.", "display_name": "Web Metric Collection Duration", "name": "jobhistory_web_metric_collection_thresholds", "value": "{\"critical\":\"never\",\"warning\":\"10000.0\"}" } ]