Hadoop Distributed File System (HDFS) icon

Hadoop Distributed File System (HDFS)

Hadoop Distributed File System (HDFS)

Plugin: go.d.plugin Module: hfs


This collector monitors HDFS nodes.

Netdata accesses HDFS metrics over Java Management Extensions (JMX) through the web interface of an HDFS daemon.

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.

Default Behavior


This integration doesn’t support auto-detection.


The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.



No action required.



The configuration file name for this integration is go.d/hdfs.conf.

You can edit the configuration file using the edit-config script from the Netdata config directory.

cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config go.d/hdfs.conf


The following options can be defined globally: update_every, autodetection_retry.

Name Description Default Required
update_every Data collection frequency. 1 False
autodetection_retry Recheck interval in seconds. Zero means no recheck will be scheduled. 0 False
url Server URL. True
timeout HTTP request timeout. 1 False
username Username for basic HTTP authentication. False
password Password for basic HTTP authentication. False
proxy_url Proxy URL. False
proxy_username Username for proxy basic HTTP authentication. False
proxy_password Password for proxy basic HTTP authentication. False
method HTTP request method. GET False
body HTTP request body. False
headers HTTP request headers. False
not_follow_redirects Redirect handling policy. Controls whether the client follows redirects. no False
tls_skip_verify Server certificate chain and hostname validation policy. Controls whether the client performs this check. no False
tls_ca Certification authority that the client uses when verifying the server’s certificates. False
tls_cert Client TLS certificate. False
tls_key Client TLS key. False



A basic example configuration.

  - name: local

HTTP authentication

Basic HTTP authentication.

  - name: local
    username: username
    password: password

HTTPS with self-signed certificate

Do not validate server certificate chain and hostname.

  - name: local
    tls_skip_verify: yes


Note: When you define multiple jobs, their names must be unique.

Collecting metrics from local and remote instances.

  - name: local

  - name: remote


Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per Hadoop Distributed File System (HDFS) instance

These metrics refer to the entire monitored application.

This scope has no labels.


Metric Dimensions Unit DataNode NameNode
hdfs.heap_memory committed, used MiB
hdfs.gc_count_total gc events/s
hdfs.gc_time_total ms ms
hdfs.gc_threshold info, warn events/s
hdfs.threads new, runnable, blocked, waiting, timed_waiting, terminated num
hdfs.logs_total info, error, warn, fatal logs/s
hdfs.rpc_bandwidth received, sent kilobits/s
hdfs.rpc_calls calls calls/s
hdfs.open_connections open connections
hdfs.call_queue_length length num
hdfs.avg_queue_time time ms
hdfs.avg_processing_time time ms
hdfs.capacity remaining, used KiB
hdfs.used_capacity dfs, non_dfs KiB
hdfs.load load load
hdfs.volume_failures_total failures events/s
hdfs.files_total files num
hdfs.blocks_total blocks num
hdfs.blocks corrupt, missing, under_replicated num
hdfs.data_nodes live, dead, stale num
hdfs.datanode_capacity remaining, used KiB
hdfs.datanode_used_capacity dfs, non_dfs KiB
hdfs.datanode_failed_volumes failed volumes num
hdfs.datanode_bandwidth reads, writes KiB/s


The following alerts are available:

Alert name On metric Description
hdfs_capacity_usage hdfs.capacity summary datanodes space capacity utilization
hdfs_missing_blocks hdfs.blocks number of missing blocks
hdfs_stale_nodes hdfs.data_nodes number of datanodes marked stale due to delayed heartbeat
hdfs_dead_nodes hdfs.data_nodes number of datanodes which are currently dead
hdfs_num_failed_volumes hdfs.num_failed_volumes number of failed volumes


Debug Mode

To troubleshoot issues with the hfs collector, run the go.d.plugin with the debug option enabled. The output should give you clues as to why the collector isn’t working.

  • Navigate to the plugins.d directory, usually at /usr/libexec/netdata/plugins.d/. If that’s not the case on your system, open netdata.conf and look for the plugins setting under [directories].

    cd /usr/libexec/netdata/plugins.d/
  • Switch to the netdata user.

    sudo -u netdata -s
  • Run the go.d.plugin to debug the collector:

    ./go.d.plugin -d -m hfs

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