Prometheus Hadoop HDFS FSImage Exporter

Exports Hadoop HDFS statistics to Prometheus monitoring including

• total / per user / per group / per configured directory path / per set of paths
  • number of directories
  • number of files
  • file size and optionally size distribution
  • number of blocks
  • file replication (overall / per user summary)

The exporter parses the FSImage using the Hadoop FSImage Analysis library. This approach has the advantage of

• being fast (2.6 GB FSImage ~ 50s)
• adding no heavy additional load to HDFS NameNode (no NameNode queries, you can run it on 2nd NameNode)

The disadvantage is

• no real time update, only when NameNode writes FSImage (interval of hours, see dfs.namenode.checkpoint.period).
  This should be sufficient for most cases (long term trend, detecting HDFS small file abuses, user and group stats)
• parsing takes 2x-3x FSImage size in heap space

The exporter parses fsimage data in background thread which checks every 60s for fsimage changes. This avoids blocking and long-running Prometheus scrapes and potentially stale metrics.

Grafana dashboards

• Hadoop HDFS FSImage by kaszpir

Requirements

For building:

• JDK 8
• Maven 3.9.x
• Docker (only required if building docker image)

For running:

• JRE 8+ for running (JRE 17+ LTS recommended)
• Access to Hadoop FSImage file
• Docker (only required if building docker image)

Downloading

Available on and as docker image on Docker Hub

Building

mvn clean install

You can test the exporter using run_example.sh after building.

For building including docker image, run:

mvn clean install -Pdocker

You can run the docker image via maven, too:

mvn clean install docker:run -Pdocker

Or directly using docker command line

docker run -i -t -p 9709:9709 -v $PWD/src/test/resources:/fsimage-location \
           -e "JAVA_OPTS=-server -XX:+UseG1GC -Xmx1024m" \
           marcelmay/hadoop-hdfs-fsimage-exporter

When running the docker image via Maven, docker will mount the projects' src/test/resources directory (with test fsimage) and expose the exporter on http://0.0.0.0:9709/ .

Installation and configuration

• Install the JAR on a system where the FSImage is locally available (e.g. name node server).

• Configure the exporter
  Create a yml file (see example.yml):

  # Path where HDFS NameNode stores the fsimage files
  # See https://hadoop.apache.org/docs/r2.7.3/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml#dfs.namenode.name.dir
  fsImagePath : 'src/test/resources'
  
  # Skip file size distribution for group based stats
  skipFileDistributionForGroupStats : true
  
  # Skip file size distribution for user based stats
  # Enable for figuring out who has too many small files.
  skipFileDistributionForUserStats : false
  
  # Compute per path stats
  # Supports regex matching per path part
  paths:
    - '/tmp'
    - '/datalak.?/a.*'
    - '/hive_warehouse/.*/.*'
    - '/user/m.*'
    
  # Skip file size distribution for path based stats
  skipFileDistributionForPathStats : true
  
  # Path sets are grouped paths by an identifier.
  # The exporter computes for each identifier the stats.
  # Compared to simple "paths" above, this allows to specify several paths for one stat computation.
  pathSets:
    'userMmAndFooAndAsset1' : [
      '/datalake/asset3',
      '/user/mm',
      '/user/foo'
      '/user/b.*' # With regexp for path part
      ]
    'datalakeAsset1and2' : [
      '/datalake/asset1',
    '/datalake/asset2'
    ]
    
  # Skip file size distribution for path sets based stats
  skipFileDistributionForPathSetStats : true
  

  Note that the flag toggling file size distribution switches between Summary (few time series) and Histogram (many time series)

• Run the exporter

    > java -jar target/fsimage-exporter.jar
    Usage: WebServer [-Dlog.level=[WARN|INFO|DEBUG]] <hostname> <port> <yml configuration file>
  

  Example JVM opts (-Xmx max heap depends on your fsimage size):

  > java -Xmx1024m -dsa -server -XX:+UseG1GC \
         -jar target/fsimage-exporter-1.0-SNAPSHOT.jar \
         0.0.0.0 9709 example.yml
  

  Note: Make sure to size the heap correctly. As a heuristic, you can use 3 * fsimage size.

  Note: Previous versions up to 1.3 use the default port 7772 instead of 9709

• Test the exporter
  Open http://<hostname>:<port>/metrics or http://<hostname>:<port>/ (for configuration overview)

• Add to prometheus

  - job_name: 'fsimage'
      scrape_interval: 180m # Depends on how often the name node writes a fsimage file.
      scrape_timeout:  200s # Depends on size
      static_configs:
        - targets: ['<hostname>:<port>']
          labels:
            ...
  

  Note:
  For Grafana, you want to sample more often with a scrape interval of minutes. The exporter caches previously parsed FSImage, so it is a fast operation.

Metrics

The metrics follow the naming and labelling pattern fsimage_[AGG][NAME]_[METRIC TYPE SPECIFIC] where

• AGG is the aggregation level

  • Empty aggregation for overall stats
    Example for total number of files: fsimage_fsize_count{}
  • user for by user aggregations Example for number of files for a user: fsimage_user_fsize_count{user_name="foo"}
  • group for by group aggregations
    Example for number of files for a group: fsimage_group_fsize_count{group_name="nobody"}
  • path for by configured path aggregations
    Example for total size in path: fsimage_path_fsize_sum{path="/datalake/asset2"}
  • path_set for by configured path set aggregations
    A path set aggregates for several configured paths and is identified by name
    Example for total number of files for given path set logs : fsimage_path_set_fsize_count{path_set="logs"}

• NAME can be

  • fsize for tracking file size and file number
  • replication for tracking file replication
  • blocks for number of file data blocks
  • dirs for tracking number of files
  • links for tracking number of symbolic links

• METRIC TYPE SPECIFIC depends on metric type (Counter, Gauge, Histogram, Summary ...)

Details

• File size fsize

  • Tracks number of files and file size
  • Type: Depends on configuration flag skipFileDistribution[ForUser|ForGroup|ForPath|ForPathSets]Stats
    • Summary : when flag is false (default)
    • Histogram : when flag is true
      Note that you can also configure the buckets via fileSizeDistributionBuckets
  • fsimage_[AGG_]fsize_count : The total number of files
  • fsimage_[AGG_]fsize_sum : The total number of bytes
  • fsimage_[AGG_]fsize_bucket{le=""} : The number of files in this bucket range

• Replication replication

  • Tracks file replication
  • Type: Summary
  • fsimage_[AGG_]replication_count
  • fsimage_[AGG_]replication_sum

• File blocks

  • Tracks number of file blocks
  • Type: Gauge
  • fsimage_[AGG_]blocks

• Directory dirs

  • Tracks number of directories
  • Type: Gauge
  • fsimage_[AGG_]dirs

• Directory links

  • Tracks number of filesystem links
  • Type: Gauge
  • fsimage_[AGG_]links

Exporter internal metrics

Metric	Type	Descriptions
fsimage_exporter_build_info{appVersion, buildTime, buildScmVersion, buildScmBranch}	Info	Build info
fsimage_compute_stats_duration_seconds[_count,_sum]	Summary	Time for computing stats for a loaded/parsed FSImage (after parsing)
fsimage_load_duration_seconds[_count,_sum]	Summary	Time for loading/parsing FSImage
fsimage_load_file_size_bytes	Gauge	Size of raw FSImage file parsed
fsimage_scrape_duration_seconds	Gauge	Exporter scrape request duration (does not include fsimage load/parsing/stats-computation)
fsimage_scrape_errors_total	Count	Count of failed scrapes
fsimage_scrape_requests_total	Count	Total number of scrape requests received
jvm_memory*		Exporter JVM memory settings, see MemoryPoolsExports

Example output

Example home output

Example metrics

Here's the example output for the test fsimage, using example.yml configuration:

# HELP fsimage_path_fsize Path specific file size and file count
# TYPE fsimage_path_fsize summary
fsimage_path_fsize_count{path="/datalake/asset2",} 2.0
fsimage_path_fsize_sum{path="/datalake/asset2",} 2098176.0
fsimage_path_fsize_count{path="/datalake/asset3",} 3.0
fsimage_path_fsize_sum{path="/datalake/asset3",} 6291456.0
fsimage_path_fsize_count{path="/user/mm",} 0.0
fsimage_path_fsize_sum{path="/user/mm",} 0.0
fsimage_path_fsize_count{path="/datalake/asset1",} 0.0
fsimage_path_fsize_sum{path="/datalake/asset1",} 0.0
# HELP fsimage_user_fsize Per user file size distribution
# TYPE fsimage_user_fsize histogram
fsimage_user_fsize_bucket{user_name="root",le="0.0",} 0.0
fsimage_user_fsize_bucket{user_name="root",le="1048576.0",} 1.0
fsimage_user_fsize_bucket{user_name="root",le="3.3554432E7",} 1.0
fsimage_user_fsize_bucket{user_name="root",le="6.7108864E7",} 1.0
fsimage_user_fsize_bucket{user_name="root",le="1.34217728E8",} 1.0
fsimage_user_fsize_bucket{user_name="root",le="1.073741824E9",} 1.0
fsimage_user_fsize_bucket{user_name="root",le="1.073741824E10",} 1.0
fsimage_user_fsize_bucket{user_name="root",le="+Inf",} 1.0
fsimage_user_fsize_count{user_name="root",} 1.0
fsimage_user_fsize_sum{user_name="root",} 1024.0
fsimage_user_fsize_bucket{user_name="foo",le="0.0",} 0.0
fsimage_user_fsize_bucket{user_name="foo",le="1048576.0",} 0.0
fsimage_user_fsize_bucket{user_name="foo",le="3.3554432E7",} 0.0
fsimage_user_fsize_bucket{user_name="foo",le="6.7108864E7",} 0.0
fsimage_user_fsize_bucket{user_name="foo",le="1.34217728E8",} 0.0
fsimage_user_fsize_bucket{user_name="foo",le="1.073741824E9",} 1.0
fsimage_user_fsize_bucket{user_name="foo",le="1.073741824E10",} 1.0
fsimage_user_fsize_bucket{user_name="foo",le="+Inf",} 1.0
fsimage_user_fsize_count{user_name="foo",} 1.0
fsimage_user_fsize_sum{user_name="foo",} 1.6777216E8
fsimage_user_fsize_bucket{user_name="mm",le="0.0",} 0.0
fsimage_user_fsize_bucket{user_name="mm",le="1048576.0",} 3.0
fsimage_user_fsize_bucket{user_name="mm",le="3.3554432E7",} 12.0
fsimage_user_fsize_bucket{user_name="mm",le="6.7108864E7",} 13.0
fsimage_user_fsize_bucket{user_name="mm",le="1.34217728E8",} 14.0
fsimage_user_fsize_bucket{user_name="mm",le="1.073741824E9",} 14.0
fsimage_user_fsize_bucket{user_name="mm",le="1.073741824E10",} 14.0
fsimage_user_fsize_bucket{user_name="mm",le="+Inf",} 14.0
fsimage_user_fsize_count{user_name="mm",} 14.0
fsimage_user_fsize_sum{user_name="mm",} 1.8863616E8
# HELP fsimage_compute_stats_duration_seconds Time for computing stats for a loaded FSImage
# TYPE fsimage_compute_stats_duration_seconds summary
fsimage_compute_stats_duration_seconds_count 1.0
fsimage_compute_stats_duration_seconds_sum 0.069411349
# HELP fsimage_path_blocks Number of blocks.
# TYPE fsimage_path_blocks gauge
fsimage_path_blocks{path="/datalake/asset2",} 2.0
fsimage_path_blocks{path="/datalake/asset3",} 3.0
fsimage_path_blocks{path="/user/mm",} 0.0
fsimage_path_blocks{path="/datalake/asset1",} 0.0
# HELP fsimage_links Number of sym links.
# TYPE fsimage_links gauge
fsimage_links 0.0
# HELP fsimage_path_dirs Number of directories.
# TYPE fsimage_path_dirs gauge
fsimage_path_dirs{path="/datalake/asset2",} 0.0
fsimage_path_dirs{path="/datalake/asset3",} 2.0
fsimage_path_dirs{path="/user/mm",} 0.0
fsimage_path_dirs{path="/datalake/asset1",} 0.0
# HELP fsimage_fsize Overall file size distribution
# TYPE fsimage_fsize histogram
fsimage_fsize_bucket{le="0.0",} 0.0
fsimage_fsize_bucket{le="1048576.0",} 4.0
fsimage_fsize_bucket{le="3.3554432E7",} 13.0
fsimage_fsize_bucket{le="6.7108864E7",} 14.0
fsimage_fsize_bucket{le="1.34217728E8",} 15.0
fsimage_fsize_bucket{le="1.073741824E9",} 16.0
fsimage_fsize_bucket{le="1.073741824E10",} 16.0
fsimage_fsize_bucket{le="+Inf",} 16.0
fsimage_fsize_count 16.0
fsimage_fsize_sum 3.56409344E8
# HELP fsimage_path_set_links Number of sym links.
# TYPE fsimage_path_set_links gauge
fsimage_path_set_links{path_set="userMmAndFooAndAsset1",} 0.0
fsimage_path_set_links{path_set="datalakeAsset1and2",} 0.0
# HELP fsimage_dirs Number of directories.
# TYPE fsimage_dirs gauge
fsimage_dirs 14.0
# HELP fsimage_group_blocks Number of blocks.
# TYPE fsimage_group_blocks gauge
fsimage_group_blocks{group_name="root",} 1.0
fsimage_group_blocks{group_name="supergroup",} 13.0
fsimage_group_blocks{group_name="nobody",} 3.0
# HELP fsimage_blocks Number of blocks.
# TYPE fsimage_blocks gauge
fsimage_blocks 17.0
# HELP fsimage_scrape_duration_seconds Scrape duration
# TYPE fsimage_scrape_duration_seconds gauge
fsimage_scrape_duration_seconds 3.55993E-4
# HELP fsimage_user_dirs Number of directories.
# TYPE fsimage_user_dirs gauge
fsimage_user_dirs{user_name="foo",} 0.0
fsimage_user_dirs{user_name="root",} 0.0
fsimage_user_dirs{user_name="mm",} 14.0
# HELP fsimage_load_file_size_bytes Size of raw FSImage
# TYPE fsimage_load_file_size_bytes gauge
fsimage_load_file_size_bytes 2420.0
# HELP fsimage_path_set_fsize Path set specific file size and file count
# TYPE fsimage_path_set_fsize summary
fsimage_path_set_fsize_count{path_set="userMmAndFooAndAsset1",} 3.0
fsimage_path_set_fsize_sum{path_set="userMmAndFooAndAsset1",} 6291456.0
fsimage_path_set_fsize_count{path_set="datalakeAsset1and2",} 2.0
fsimage_path_set_fsize_sum{path_set="datalakeAsset1and2",} 2098176.0
# HELP fsimage_user_replication Per user file replication
# TYPE fsimage_user_replication summary
fsimage_user_replication_count{user_name="root",} 1.0
fsimage_user_replication_sum{user_name="root",} 1.0
fsimage_user_replication_count{user_name="foo",} 1.0
fsimage_user_replication_sum{user_name="foo",} 1.0
fsimage_user_replication_count{user_name="mm",} 14.0
fsimage_user_replication_sum{user_name="mm",} 20.0
# HELP fsimage_group_fsize Per group file size and file count
# TYPE fsimage_group_fsize summary
fsimage_group_fsize_count{group_name="root",} 1.0
fsimage_group_fsize_sum{group_name="root",} 1024.0
fsimage_group_fsize_count{group_name="supergroup",} 13.0
fsimage_group_fsize_sum{group_name="supergroup",} 1.6766464E8
fsimage_group_fsize_count{group_name="nobody",} 2.0
fsimage_group_fsize_sum{group_name="nobody",} 1.8874368E8
# HELP fsimage_user_links Number of sym links.
# TYPE fsimage_user_links gauge
fsimage_user_links{user_name="foo",} 0.0
fsimage_user_links{user_name="root",} 0.0
fsimage_user_links{user_name="mm",} 0.0
# HELP fsimage_path_set_dirs Number of directories.
# TYPE fsimage_path_set_dirs gauge
fsimage_path_set_dirs{path_set="userMmAndFooAndAsset1",} 2.0
fsimage_path_set_dirs{path_set="datalakeAsset1and2",} 0.0
# HELP fsimage_group_links Number of sym links.
# TYPE fsimage_group_links gauge
fsimage_group_links{group_name="root",} 0.0
fsimage_group_links{group_name="supergroup",} 0.0
fsimage_group_links{group_name="nobody",} 0.0
# HELP fsimage_load_duration_seconds Time for loading/parsing FSImage
# TYPE fsimage_load_duration_seconds summary
fsimage_load_duration_seconds_count 1.0
fsimage_load_duration_seconds_sum 0.109007164
# HELP fsimage_scrape_errors_total Counts failed scrapes.
# TYPE fsimage_scrape_errors_total counter
fsimage_scrape_errors_total 0.0
# HELP fsimage_path_set_blocks Number of blocks.
# TYPE fsimage_path_set_blocks gauge
fsimage_path_set_blocks{path_set="userMmAndFooAndAsset1",} 3.0
fsimage_path_set_blocks{path_set="datalakeAsset1and2",} 2.0
# HELP fsimage_group_dirs Number of directories.
# TYPE fsimage_group_dirs gauge
fsimage_group_dirs{group_name="root",} 0.0
fsimage_group_dirs{group_name="supergroup",} 14.0
fsimage_group_dirs{group_name="nobody",} 0.0
# HELP fsimage_replication Overall file replication
# TYPE fsimage_replication summary
fsimage_replication_count 16.0
fsimage_replication_sum 22.0
# HELP fsimage_user_blocks Number of blocks.
# TYPE fsimage_user_blocks gauge
fsimage_user_blocks{user_name="foo",} 2.0
fsimage_user_blocks{user_name="root",} 1.0
fsimage_user_blocks{user_name="mm",} 14.0
# HELP fsimage_exporter_build_info Application build info
# TYPE fsimage_exporter_build_info gauge
fsimage_exporter_build_info{appVersion="1.1-SNAPSHOT",buildTime="2017-10-17/19:13",buildScmVersion="491d70f88c6bc96c6a0d19fca27af07519534782",buildScmBranch="master",} 1.0
# HELP fsimage_scrape_requests_total Exporter requests made
# TYPE fsimage_scrape_requests_total counter
fsimage_scrape_requests_total 2.0
# HELP fsimage_path_links Number of sym links.
# TYPE fsimage_path_links gauge
fsimage_path_links{path="/datalake/asset2",} 0.0
fsimage_path_links{path="/datalake/asset3",} 0.0
fsimage_path_links{path="/user/mm",} 0.0
fsimage_path_links{path="/datalake/asset1",} 0.0
# HELP jvm_info VM version info
# TYPE jvm_info gauge
jvm_info{runtime="OpenJDK Runtime Environment",vendor="Azul Systems, Inc.",version="17.0.3+7-LTS",} 1.0
# HELP jvm_memory_objects_pending_finalization The number of objects waiting in the finalizer queue.
# TYPE jvm_memory_objects_pending_finalization gauge
jvm_memory_objects_pending_finalization 0.0
# HELP jvm_memory_bytes_used Used bytes of a given JVM memory area.
# TYPE jvm_memory_bytes_used gauge
jvm_memory_bytes_used{area="heap",} 4.0467168E7
jvm_memory_bytes_used{area="nonheap",} 1.435964E7
# HELP jvm_memory_bytes_committed Committed (bytes) of a given JVM memory area.
# TYPE jvm_memory_bytes_committed gauge
jvm_memory_bytes_committed{area="heap",} 1.34217728E8
jvm_memory_bytes_committed{area="nonheap",} 1.9070976E7
# HELP jvm_memory_bytes_max Max (bytes) of a given JVM memory area.
# TYPE jvm_memory_bytes_max gauge
jvm_memory_bytes_max{area="heap",} 2.08666624E9
jvm_memory_bytes_max{area="nonheap",} -1.0
# HELP jvm_memory_bytes_init Initial bytes of a given JVM memory area.
# TYPE jvm_memory_bytes_init gauge
jvm_memory_bytes_init{area="heap",} 1.32120576E8
jvm_memory_bytes_init{area="nonheap",} 7667712.0
# HELP jvm_memory_pool_bytes_used Used bytes of a given JVM memory pool.
# TYPE jvm_memory_pool_bytes_used gauge
jvm_memory_pool_bytes_used{pool="CodeHeap 'non-nmethods'",} 1227264.0
jvm_memory_pool_bytes_used{pool="Metaspace",} 9939760.0
jvm_memory_pool_bytes_used{pool="CodeHeap 'profiled nmethods'",} 1813888.0
jvm_memory_pool_bytes_used{pool="Compressed Class Space",} 1119016.0
jvm_memory_pool_bytes_used{pool="G1 Eden Space",} 6291456.0
jvm_memory_pool_bytes_used{pool="G1 Old Gen",} 3.3477632E7
jvm_memory_pool_bytes_used{pool="G1 Survivor Space",} 698080.0
jvm_memory_pool_bytes_used{pool="CodeHeap 'non-profiled nmethods'",} 259712.0
# HELP jvm_memory_pool_bytes_committed Committed bytes of a given JVM memory pool.
# TYPE jvm_memory_pool_bytes_committed gauge
jvm_memory_pool_bytes_committed{pool="CodeHeap 'non-nmethods'",} 2555904.0
jvm_memory_pool_bytes_committed{pool="Metaspace",} 1.015808E7
jvm_memory_pool_bytes_committed{pool="CodeHeap 'profiled nmethods'",} 2555904.0
jvm_memory_pool_bytes_committed{pool="Compressed Class Space",} 1245184.0
jvm_memory_pool_bytes_committed{pool="G1 Eden Space",} 1.3631488E7
jvm_memory_pool_bytes_committed{pool="G1 Old Gen",} 1.19537664E8
jvm_memory_pool_bytes_committed{pool="G1 Survivor Space",} 1048576.0
jvm_memory_pool_bytes_committed{pool="CodeHeap 'non-profiled nmethods'",} 2555904.0
# HELP jvm_memory_pool_bytes_max Max bytes of a given JVM memory pool.
# TYPE jvm_memory_pool_bytes_max gauge
jvm_memory_pool_bytes_max{pool="CodeHeap 'non-nmethods'",} 5828608.0
jvm_memory_pool_bytes_max{pool="Metaspace",} -1.0
jvm_memory_pool_bytes_max{pool="CodeHeap 'profiled nmethods'",} 1.22912768E8
jvm_memory_pool_bytes_max{pool="Compressed Class Space",} 1.073741824E9
jvm_memory_pool_bytes_max{pool="G1 Eden Space",} -1.0
jvm_memory_pool_bytes_max{pool="G1 Old Gen",} 2.08666624E9
jvm_memory_pool_bytes_max{pool="G1 Survivor Space",} -1.0
jvm_memory_pool_bytes_max{pool="CodeHeap 'non-profiled nmethods'",} 1.22916864E8
# HELP jvm_memory_pool_bytes_init Initial bytes of a given JVM memory pool.
# TYPE jvm_memory_pool_bytes_init gauge
jvm_memory_pool_bytes_init{pool="CodeHeap 'non-nmethods'",} 2555904.0
jvm_memory_pool_bytes_init{pool="Metaspace",} 0.0
jvm_memory_pool_bytes_init{pool="CodeHeap 'profiled nmethods'",} 2555904.0
jvm_memory_pool_bytes_init{pool="Compressed Class Space",} 0.0
jvm_memory_pool_bytes_init{pool="G1 Eden Space",} 7340032.0
jvm_memory_pool_bytes_init{pool="G1 Old Gen",} 1.24780544E8
jvm_memory_pool_bytes_init{pool="G1 Survivor Space",} 0.0
jvm_memory_pool_bytes_init{pool="CodeHeap 'non-profiled nmethods'",} 2555904.0
# HELP jvm_memory_pool_collection_used_bytes Used bytes after last collection of a given JVM memory pool.
# TYPE jvm_memory_pool_collection_used_bytes gauge
jvm_memory_pool_collection_used_bytes{pool="G1 Eden Space",} 0.0
jvm_memory_pool_collection_used_bytes{pool="G1 Old Gen",} 0.0
jvm_memory_pool_collection_used_bytes{pool="G1 Survivor Space",} 698080.0
# HELP jvm_memory_pool_collection_committed_bytes Committed after last collection bytes of a given JVM memory pool.
# TYPE jvm_memory_pool_collection_committed_bytes gauge
jvm_memory_pool_collection_committed_bytes{pool="G1 Eden Space",} 1.3631488E7
jvm_memory_pool_collection_committed_bytes{pool="G1 Old Gen",} 0.0
jvm_memory_pool_collection_committed_bytes{pool="G1 Survivor Space",} 1048576.0
# HELP jvm_memory_pool_collection_max_bytes Max bytes after last collection of a given JVM memory pool.
# TYPE jvm_memory_pool_collection_max_bytes gauge
jvm_memory_pool_collection_max_bytes{pool="G1 Eden Space",} -1.0
jvm_memory_pool_collection_max_bytes{pool="G1 Old Gen",} 2.08666624E9
jvm_memory_pool_collection_max_bytes{pool="G1 Survivor Space",} -1.0
# HELP jvm_memory_pool_collection_init_bytes Initial after last collection bytes of a given JVM memory pool.
# TYPE jvm_memory_pool_collection_init_bytes gauge
jvm_memory_pool_collection_init_bytes{pool="G1 Eden Space",} 7340032.0
jvm_memory_pool_collection_init_bytes{pool="G1 Old Gen",} 1.24780544E8
jvm_memory_pool_collection_init_bytes{pool="G1 Survivor Space",} 0.0
# HELP jvm_buffer_pool_used_bytes Used bytes of a given JVM buffer pool.
# TYPE jvm_buffer_pool_used_bytes gauge
jvm_buffer_pool_used_bytes{pool="mapped",} 0.0
jvm_buffer_pool_used_bytes{pool="direct",} 8192.0
jvm_buffer_pool_used_bytes{pool="mapped - 'non-volatile memory'",} 0.0
# HELP jvm_buffer_pool_capacity_bytes Bytes capacity of a given JVM buffer pool.
# TYPE jvm_buffer_pool_capacity_bytes gauge
jvm_buffer_pool_capacity_bytes{pool="mapped",} 0.0
jvm_buffer_pool_capacity_bytes{pool="direct",} 8192.0
jvm_buffer_pool_capacity_bytes{pool="mapped - 'non-volatile memory'",} 0.0
# HELP jvm_buffer_pool_used_buffers Used buffers of a given JVM buffer pool.
# TYPE jvm_buffer_pool_used_buffers gauge
jvm_buffer_pool_used_buffers{pool="mapped",} 0.0
jvm_buffer_pool_used_buffers{pool="direct",} 1.0
jvm_buffer_pool_used_buffers{pool="mapped - 'non-volatile memory'",} 0.0
# HELP jvm_gc_collection_seconds Time spent in a given JVM garbage collector in seconds.
# TYPE jvm_gc_collection_seconds summary
jvm_gc_collection_seconds_count{gc="G1 Young Generation",} 2.0
jvm_gc_collection_seconds_sum{gc="G1 Young Generation",} 0.015
jvm_gc_collection_seconds_count{gc="G1 Old Generation",} 0.0
jvm_gc_collection_seconds_sum{gc="G1 Old Generation",} 0.0
# HELP jvm_classes_currently_loaded The number of classes that are currently loaded in the JVM
# TYPE jvm_classes_currently_loaded gauge
jvm_classes_currently_loaded 2696.0
# HELP jvm_classes_loaded_total The total number of classes that have been loaded since the JVM has started execution
# TYPE jvm_classes_loaded_total counter
jvm_classes_loaded_total 2696.0
# HELP jvm_classes_unloaded_total The total number of classes that have been unloaded since the JVM has started execution
# TYPE jvm_classes_unloaded_total counter
jvm_classes_unloaded_total 0.0
# HELP jvm_memory_pool_allocated_bytes_total Total bytes allocated in a given JVM memory pool. Only updated after GC, not continuously.
# TYPE jvm_memory_pool_allocated_bytes_total counter
jvm_memory_pool_allocated_bytes_total{pool="CodeHeap 'profiled nmethods'",} 1523712.0
jvm_memory_pool_allocated_bytes_total{pool="G1 Old Gen",} 7263232.0
jvm_memory_pool_allocated_bytes_total{pool="G1 Eden Space",} 4194304.0
jvm_memory_pool_allocated_bytes_total{pool="CodeHeap 'non-profiled nmethods'",} 235520.0
jvm_memory_pool_allocated_bytes_total{pool="G1 Survivor Space",} 1048576.0
jvm_memory_pool_allocated_bytes_total{pool="Compressed Class Space",} 819496.0
jvm_memory_pool_allocated_bytes_total{pool="Metaspace",} 7211880.0
jvm_memory_pool_allocated_bytes_total{pool="CodeHeap 'non-nmethods'",} 1187328.0
# HELP jvm_threads_current Current thread count of a JVM
# TYPE jvm_threads_current gauge
jvm_threads_current 12.0
# HELP jvm_threads_daemon Daemon thread count of a JVM
# TYPE jvm_threads_daemon gauge
jvm_threads_daemon 10.0
# HELP jvm_threads_peak Peak thread count of a JVM
# TYPE jvm_threads_peak gauge
jvm_threads_peak 12.0
# HELP jvm_threads_started_total Started thread count of a JVM
# TYPE jvm_threads_started_total counter
jvm_threads_started_total 14.0
# HELP jvm_threads_deadlocked Cycles of JVM-threads that are in deadlock waiting to acquire object monitors or ownable synchronizers
# TYPE jvm_threads_deadlocked gauge
jvm_threads_deadlocked 0.0
# HELP jvm_threads_deadlocked_monitor Cycles of JVM-threads that are in deadlock waiting to acquire object monitors
# TYPE jvm_threads_deadlocked_monitor gauge
jvm_threads_deadlocked_monitor 0.0
# HELP jvm_threads_state Current count of threads by state
# TYPE jvm_threads_state gauge
jvm_threads_state{state="NEW",} 0.0
jvm_threads_state{state="BLOCKED",} 0.0
jvm_threads_state{state="TERMINATED",} 0.0
jvm_threads_state{state="RUNNABLE",} 6.0
jvm_threads_state{state="TIMED_WAITING",} 5.0
jvm_threads_state{state="WAITING",} 1.0
# HELP jvm_memory_pool_allocated_bytes_created Total bytes allocated in a given JVM memory pool. Only updated after GC, not continuously.
# TYPE jvm_memory_pool_allocated_bytes_created gauge
jvm_memory_pool_allocated_bytes_created{pool="CodeHeap 'profiled nmethods'",} 1.655229684257E9
jvm_memory_pool_allocated_bytes_created{pool="G1 Old Gen",} 1.655229684257E9
jvm_memory_pool_allocated_bytes_created{pool="G1 Eden Space",} 1.655229684257E9
jvm_memory_pool_allocated_bytes_created{pool="CodeHeap 'non-profiled nmethods'",} 1.655229684257E9
jvm_memory_pool_allocated_bytes_created{pool="G1 Survivor Space",} 1.655229684257E9
jvm_memory_pool_allocated_bytes_created{pool="Compressed Class Space",} 1.655229684257E9
jvm_memory_pool_allocated_bytes_created{pool="Metaspace",} 1.655229684257E9
jvm_memory_pool_allocated_bytes_created{pool="CodeHeap 'non-nmethods'",} 1.655229684257E9

License

This Hadoop HDFS FSImage Exporter is released under the Apache 2.0 license.

Copyright 2018+ Marcel May

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.