[
    {
        "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": "History Server Environment Advanced Configuration Snippet (Safety Valve)",
        "name": "SPARK_YARN_HISTORY_SERVER_role_env_safety_valve",
        "value": null
    },
    {
        "desc": "The port of the history server WebUI",
        "display_name": "History Server WebUI Port",
        "name": "history_server_web_port",
        "value": "18088"
    },
    {
        "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": "How often to poll HDFS for new applications.",
        "display_name": "HDFS Polling Interval",
        "name": "history_server_fs_poll_interval",
        "value": "10"
    },
    {
        "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": "Whether to suppress configuration warnings produced by the built-in parameter validation for the History Server Logging Advanced Configuration Snippet (Safety Valve) parameter.",
        "display_name": "Suppress Parameter Validation: History Server Logging Advanced Configuration Snippet (Safety Valve)",
        "name": "role_config_suppression_log4j_safety_valve",
        "value": "false"
    },
    {
        "desc": "<p>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.</p><p>Each trigger has the following fields:</p><ul><li><code>triggerName</code> <strong>(mandatory)</strong> - The name of the trigger. This value must be unique for the specific role. </li><li><code>triggerExpression</code> <strong>(mandatory)</strong> - A tsquery expression representing the trigger. </li><li><code>streamThreshold</code> <strong>(optional)</strong> - 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. </li><li><code>enabled</code> <strong> (optional)</strong> - By default set to 'true'. If set to 'false', the trigger is not evaluated.</li><li><code>expressionEditorConfig</code> <strong> (optional)</strong> - Metadata for the trigger editor. If present, the trigger should only be edited from the Edit Trigger page; editing the trigger here can lead to inconsistencies.</li></ul></p><p>For example, the following JSON formatted trigger configured for a DataNode fires if the DataNode has more than 1500 file descriptors opened:</p><p><pre>[{\"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\"}]</pre></p><p>See the trigger rules documentation for more details on how to write triggers using tsquery.</p><p>The JSON format is evolving and may change and, as a result, backward compatibility is not guaranteed between releases.</p>",
        "display_name": "Role Triggers",
        "name": "role_triggers",
        "value": "[]"
    },
    {
        "desc": "Whether to suppress the results of the File Descriptors heath test. The results of suppressed health tests are ignored when computing the overall health of the associated host, role or service, so suppressed health tests will not generate alerts.",
        "display_name": "Suppress Health Test: File Descriptors",
        "name": "role_health_suppression_spark_on_yarn_spark_yarn_history_server_file_descriptor",
        "value": "false"
    },
    {
        "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": "Max number of application UIs to keep in the History Server's memory. All applications will still be available, but may take longer to load if they're not in memory.",
        "display_name": "Retained App Count",
        "name": "history_server_retained_apps",
        "value": "50"
    },
    {
        "desc": "Whether to suppress configuration warnings produced by the CDH Version Validator configuration validator.",
        "display_name": "Suppress Configuration Validator: CDH Version Validator",
        "name": "role_config_suppression_cdh_version_validator",
        "value": "false"
    },
    {
        "desc": "The log directory for log files of the role History Server.",
        "display_name": "History Server Log Directory",
        "name": "log_dir",
        "value": "/var/log/spark"
    },
    {
        "desc": "Whether to suppress configuration warnings produced by the built-in parameter validation for the History Server Advanced Configuration Snippet (Safety Valve) for spark-history-server.conf parameter.",
        "display_name": "Suppress Parameter Validation: History Server Advanced Configuration Snippet (Safety Valve) for spark-history-server.conf",
        "name": "role_config_suppression_spark-history-server.conf_role_safety_valve",
        "value": "false"
    },
    {
        "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": "spark_yarn_history_server_fd_thresholds",
        "value": "{\"critical\":\"70.0\",\"warning\":\"50.0\"}"
    },
    {
        "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": "For advanced use only, a string to be inserted into <strong>log4j.properties</strong> for this role only.",
        "display_name": "History Server Logging Advanced Configuration Snippet (Safety Valve)",
        "name": "log4j_safety_valve",
        "value": null
    },
    {
        "desc": "Whether to suppress configuration warnings produced by the built-in parameter validation for the Role Triggers parameter.",
        "display_name": "Suppress Parameter Validation: Role Triggers",
        "name": "role_config_suppression_role_triggers",
        "value": "false"
    },
    {
        "desc": "Maximum size for the Java process heap memory. Passed to Java -Xmx. Measured in bytes.",
        "display_name": "Java Heap Size of History Server in Bytes",
        "name": "history_server_max_heapsize",
        "value": "268435456"
    },
    {
        "desc": "Whether to suppress the results of the Host Health heath test. The results of suppressed health tests are ignored when computing the overall health of the associated host, role or service, so suppressed health tests will not generate alerts.",
        "display_name": "Suppress Health Test: Host Health",
        "name": "role_health_suppression_spark_on_yarn_spark_yarn_history_server_host_health",
        "value": "false"
    },
    {
        "desc": "When computing the overall History Server health, consider the host's health.",
        "display_name": "History Server Host Health Test",
        "name": "spark_yarn_history_server_host_health_enabled",
        "value": "true"
    },
    {
        "desc": "Whether to suppress the results of the Unexpected Exits heath test. The results of suppressed health tests are ignored when computing the overall health of the associated host, role or service, so suppressed health tests will not generate alerts.",
        "display_name": "Suppress Health Test: Unexpected Exits",
        "name": "role_health_suppression_spark_on_yarn_spark_yarn_history_server_unexpected_exits",
        "value": "false"
    },
    {
        "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": "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": "The maximum size, in megabytes, per log file for History Server logs.  Typically used by log4j or logback.",
        "display_name": "History Server Max Log Size",
        "name": "max_log_size",
        "value": "200"
    },
    {
        "desc": "Whether to suppress configuration warnings produced by the built-in parameter validation for the History Server Log Directory parameter.",
        "display_name": "Suppress Parameter Validation: History Server Log Directory",
        "name": "role_config_suppression_log_dir",
        "value": "false"
    },
    {
        "desc": "The period to review when computing unexpected exits.",
        "display_name": "Unexpected Exits Monitoring Period",
        "name": "unexpected_exits_window",
        "value": "5"
    },
    {
        "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": "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": "Whether to suppress the results of the Swap Memory Usage heath test. The results of suppressed health tests are ignored when computing the overall health of the associated host, role or service, so suppressed health tests will not generate alerts.",
        "display_name": "Suppress Health Test: Swap Memory Usage",
        "name": "role_health_suppression_spark_on_yarn_spark_yarn_history_server_swap_memory_usage",
        "value": "false"
    },
    {
        "desc": "For advanced use only. A string to be inserted into <strong>spark-history-server.conf</strong> for this role only.",
        "display_name": "History Server Advanced Configuration Snippet (Safety Valve) for spark-history-server.conf",
        "name": "spark-history-server.conf_role_safety_valve",
        "value": null
    },
    {
        "desc": "Whether to suppress configuration warnings produced by the built-in parameter validation for the History Server Advanced Configuration Snippet (Safety Valve) for spark-conf/spark-env.sh parameter.",
        "display_name": "Suppress Parameter Validation: History Server Advanced Configuration Snippet (Safety Valve) for spark-conf/spark-env.sh",
        "name": "role_config_suppression_spark-conf/spark-env.sh_role_safety_valve",
        "value": "false"
    },
    {
        "desc": "The maximum number of rolled log files to keep for History Server logs.  Typically used by log4j or logback.",
        "display_name": "History Server Maximum Log File Backups",
        "name": "max_log_backup_index",
        "value": "10"
    },
    {
        "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": "Enables the health test that the History Server's process state is consistent with the role configuration",
        "display_name": "History Server Process Health Test",
        "name": "spark_yarn_history_server_scm_health_enabled",
        "value": "true"
    },
    {
        "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": "Whether to suppress configuration warnings produced by the built-in parameter validation for the History Server Environment Advanced Configuration Snippet (Safety Valve) parameter.",
        "display_name": "Suppress Parameter Validation: History Server Environment Advanced Configuration Snippet (Safety Valve)",
        "name": "role_config_suppression_spark_yarn_history_server_role_env_safety_valve",
        "value": "false"
    },
    {
        "desc": "For advanced use only. A string to be inserted into <strong>spark-conf/spark-env.sh</strong> for this role only.",
        "display_name": "History Server Advanced Configuration Snippet (Safety Valve) for spark-conf/spark-env.sh",
        "name": "spark-conf/spark-env.sh_role_safety_valve",
        "value": null
    },
    {
        "desc": "The minimum log level for History Server logs",
        "display_name": "History Server Logging Threshold",
        "name": "log_threshold",
        "value": "INFO"
    },
    {
        "desc": "Whether to suppress the results of the Process Status heath test. The results of suppressed health tests are ignored when computing the overall health of the associated host, role or service, so suppressed health tests will not generate alerts.",
        "display_name": "Suppress Health Test: Process Status",
        "name": "role_health_suppression_spark_on_yarn_spark_yarn_history_server_scm_health",
        "value": "false"
    }
]