Not exposing the result string correctly, that looks to be a literal \n rather than a newline.

[Xin Ma]

Spring boot prometheus endpoint not work well.

Spring boot 2.2.6 

io.micrometer  1.4.2

io.prometheus 0.8.1

/actuator/prometheus

"# HELP rabbitmq_connections  \n# TYPE rabbitmq_connections gauge\nrabbitmq_connections{application=\"auth-service\",name=\"rabbit\",} 1.0\n# HELP jvm_threads_live_threads The current number of live threads including both daemon and non-daemon threads\n# TYPE jvm_threads_live_threads gauge\njvm_threads_live_threads{application=\"auth-service\",} 35.0\n# HELP tomcat_sessions_expired_sessions_total  \n# TYPE tomcat_sessions_expired_sessions_total counter\ntomcat_sessions_expired_sessions_total{application=\"auth-service\",} 0.0\n# HELP rabbitmq_acknowledged_total  \n# TYPE rabbitmq_acknowledged_total counter\nrabbitmq_acknowledged_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jvm_buffer_count_buffers An estimate of the number of buffers in the pool\n# TYPE jvm_buffer_count_buffers gauge\njvm_buffer_count_buffers{application=\"auth-service\",id=\"mapped\",} 0.0\njvm_buffer_count_buffers{application=\"auth-service\",id=\"direct\",} 3.0\n# HELP hikaricp_connections_creation_seconds_max Connection creation time\n# TYPE hikaricp_connections_creation_seconds_max gauge\nhikaricp_connections_creation_seconds_max{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP hikaricp_connections_creation_seconds Connection creation time\n# TYPE hikaricp_connections_creation_seconds summary\nhikaricp_connections_creation_seconds_count{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\nhikaricp_connections_creation_seconds_sum{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP hikaricp_connections_pending Pending threads\n# TYPE hikaricp_connections_pending gauge\nhikaricp_connections_pending{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP rabbitmq_unrouted_published_total  \n# TYPE rabbitmq_unrouted_published_total counter\nrabbitmq_unrouted_published_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP hikaricp_connections_idle Idle connections\n# TYPE hikaricp_connections_idle gauge\nhikaricp_connections_idle{application=\"auth-service\",pool=\"HikariPool-1\",} 10.0\n# HELP jdbc_connections_min  \n# TYPE jdbc_connections_min gauge\njdbc_connections_min{application=\"auth-service\",name=\"first\",} 10.0\n# HELP rabbitmq_rejected_total  \n# TYPE rabbitmq_rejected_total counter\nrabbitmq_rejected_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jvm_threads_daemon_threads The current number of live daemon threads\n# TYPE jvm_threads_daemon_threads gauge\njvm_threads_daemon_threads{application=\"auth-service\",} 27.0\n# HELP jvm_gc_pause_seconds Time spent in GC pause\n# TYPE jvm_gc_pause_seconds summary\njvm_gc_pause_seconds_count{action=\"end of minor GC\",application=\"auth-service\",cause=\"G1 Evacuation Pause\",} 8.0\njvm_gc_pause_seconds_sum{action=\"end of minor GC\",application=\"auth-service\",cause=\"G1 Evacuation Pause\",} 0.202\njvm_gc_pause_seconds_count{action=\"end of minor GC\",application=\"auth-service\",cause=\"Metadata GC Threshold\",} 1.0\njvm_gc_pause_seconds_sum{action=\"end of minor GC\",application=\"auth-service\",cause=\"Metadata GC Threshold\",} 0.021\n# HELP jvm_gc_pause_seconds_max Time spent in GC pause\n# TYPE jvm_gc_pause_seconds_max gauge\njvm_gc_pause_seconds_max{action=\"end of minor GC\",application=\"auth-service\",cause=\"G1 Evacuation Pause\",} 0.032\njvm_gc_pause_seconds_max{action=\"end of minor GC\",application=\"auth-service\",cause=\"Metadata GC Threshold\",} 0.021\n# HELP hikaricp_connections_active Active connections\n# TYPE hikaricp_connections_active gauge\nhikaricp_connections_active{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP rabbitmq_consumed_total  \n# TYPE rabbitmq_consumed_total counter\nrabbitmq_consumed_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP hikaricp_connections Total connections\n# TYPE hikaricp_connections gauge\nhikaricp_connections{application=\"auth-service\",pool=\"HikariPool-1\",} 10.0\n# HELP jvm_classes_loaded_classes The number of classes that are currently loaded in the Java virtual machine\n# TYPE jvm_classes_loaded_classes gauge\njvm_classes_loaded_classes{application=\"auth-service\",} 16300.0\n# HELP jdbc_connections_max  \n# TYPE jdbc_connections_max gauge\njdbc_connections_max{application=\"auth-service\",name=\"first\",} 10.0\n# HELP hikaricp_connections_max Max connections\n# TYPE hikaricp_connections_max gauge\nhikaricp_connections_max{application=\"auth-service\",pool=\"HikariPool-1\",} 10.0\n# HELP jvm_gc_max_data_size_bytes Max size of old generation memory pool\n# TYPE jvm_gc_max_data_size_bytes gauge\njvm_gc_max_data_size_bytes{application=\"auth-service\",} 4.269801472E9\n# HELP jvm_gc_memory_allocated_bytes_total Incremented for an increase in the size of the young generation memory pool after one GC to before the next\n# TYPE jvm_gc_memory_allocated_bytes_total counter\njvm_gc_memory_allocated_bytes_total{application=\"auth-service\",} 1.193279488E9\n# HELP jvm_threads_peak_threads The peak live thread count since the Java virtual machine started or peak was reset\n# TYPE jvm_threads_peak_threads gauge\njvm_threads_peak_threads{application=\"auth-service\",} 35.0\n# HELP tomcat_sessions_active_max_sessions  \n# TYPE tomcat_sessions_active_max_sessions gauge\ntomcat_sessions_active_max_sessions{application=\"auth-service\",} 0.0\n# HELP system_cpu_usage The \"recent cpu usage\" for the whole system\n# TYPE system_cpu_usage gauge\nsystem_cpu_usage{application=\"auth-service\",} 0.4291994639943644\n# HELP tomcat_sessions_created_sessions_total  \n# TYPE tomcat_sessions_created_sessions_total counter\ntomcat_sessions_created_sessions_total{application=\"auth-service\",} 0.0\n# HELP process_start_time_seconds Start time of the process since unix epoch.\n# TYPE process_start_time_seconds gauge\nprocess_start_time_seconds{application=\"auth-service\",} 1.588157126521E9\n# HELP jvm_gc_live_data_size_bytes Size of old generation memory pool after a full GC\n# TYPE jvm_gc_live_data_size_bytes gauge\njvm_gc_live_data_size_bytes{application=\"auth-service\",} 2.8757264E7\n# HELP rabbitmq_published_total  \n# TYPE rabbitmq_published_total counter\nrabbitmq_published_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP rabbitmq_failed_to_publish_total  \n# TYPE rabbitmq_failed_to_publish_total counter\nrabbitmq_failed_to_publish_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jdbc_connections_active  \n# TYPE jdbc_connections_active gauge\njdbc_connections_active{application=\"auth-service\",name=\"first\",} 0.0\n# HELP tomcat_sessions_alive_max_seconds  \n# TYPE tomcat_sessions_alive_max_seconds gauge\ntomcat_sessions_alive_max_seconds{application=\"auth-service\",} 0.0\n# HELP hikaricp_connections_min Min connections\n# TYPE hikaricp_connections_min gauge\nhikaricp_connections_min{application=\"auth-service\",pool=\"HikariPool-1\",} 10.0\n# HELP jvm_memory_used_bytes The amount of used memory\n# TYPE jvm_memory_used_bytes gauge\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-nmethods'\",} 1396352.0\njvm_memory_used_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Old Gen\",} 5.1335168E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Compressed Class Space\",} 1.124144E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-profiled nmethods'\",} 8579840.0\njvm_memory_used_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Survivor Space\",} 1.4680064E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Eden Space\",} 4.8234496E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Metaspace\",} 9.3685488E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'profiled nmethods'\",} 1.9311872E7\n# HELP system_cpu_count The number of processors available to the Java virtual machine\n# TYPE system_cpu_count gauge\nsystem_cpu_count{application=\"auth-service\",} 4.0\n# HELP jvm_classes_unloaded_classes_total The total number of classes unloaded since the Java virtual machine has started execution\n# TYPE jvm_classes_unloaded_classes_total counter\njvm_classes_unloaded_classes_total{application=\"auth-service\",} 0.0\n# HELP jvm_buffer_total_capacity_bytes An estimate of the total capacity of the buffers in this pool\n# TYPE jvm_buffer_total_capacity_bytes gauge\njvm_buffer_total_capacity_bytes{application=\"auth-service\",id=\"mapped\",} 0.0\njvm_buffer_total_capacity_bytes{application=\"auth-service\",id=\"direct\",} 24576.0\n# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use\n# TYPE jvm_memory_committed_bytes gauge\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-nmethods'\",} 2555904.0\njvm_memory_committed_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Old Gen\",} 9.961472E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Compressed Class Space\",} 1.2189696E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-profiled nmethods'\",} 1.179648E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Survivor Space\",} 1.4680064E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Eden Space\",} 1.54140672E8\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Metaspace\",} 9.6075776E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'profiled nmethods'\",} 2.326528E7\n# HELP rabbitmq_acknowledged_published_total  \n# TYPE rabbitmq_acknowledged_published_total counter\nrabbitmq_acknowledged_published_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP spring_boot_info A metric with a constant '1' value labeled by version from which spring boot application was built.\n# TYPE spring_boot_info gauge\nspring_boot_info{application=\"auth-service\",version=\"version\",} 1.0\n# HELP rabbitmq_channels  \n# TYPE rabbitmq_channels gauge\nrabbitmq_channels{application=\"auth-service\",name=\"rabbit\",} 1.0\n# HELP build_info A metric with a constant '1' value labeled by version, revision, branch from which application was built.\n# TYPE build_info gauge\nbuild_info{app=\"app\",application=\"auth-service\",branch=\"branch\",revision=\"revision\",version=\"version\",} 1.0\n# HELP rabbitmq_not_acknowledged_published_total  \n# TYPE rabbitmq_not_acknowledged_published_total counter\nrabbitmq_not_acknowledged_published_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jvm_gc_memory_promoted_bytes_total Count of positive increases in the size of the old generation memory pool before GC to after GC\n# TYPE jvm_gc_memory_promoted_bytes_total counter\njvm_gc_memory_promoted_bytes_total{application=\"auth-service\",} 3.906072E7\n# HELP hikaricp_connections_usage_seconds Connection usage time\n# TYPE hikaricp_connections_usage_seconds summary\nhikaricp_connections_usage_seconds_count{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\nhikaricp_connections_usage_seconds_sum{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP hikaricp_connections_usage_seconds_max Connection usage time\n# TYPE hikaricp_connections_usage_seconds_max gauge\nhikaricp_connections_usage_seconds_max{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP http_server_requests_seconds  \n# TYPE http_server_requests_seconds summary\nhttp_server_requests_seconds_count{application=\"auth-service\",exception=\"None\",method=\"GET\",outcome=\"SUCCESS\",status=\"200\",uri=\"/actuator/prometheus\",} 2.0\nhttp_server_requests_seconds_sum{application=\"auth-service\",exception=\"None\",method=\"GET\",outcome=\"SUCCESS\",status=\"200\",uri=\"/actuator/prometheus\",} 2.8990479\n# HELP http_server_requests_seconds_max  \n# TYPE http_server_requests_seconds_max gauge\nhttp_server_requests_seconds_max{application=\"auth-service\",exception=\"None\",method=\"GET\",outcome=\"SUCCESS\",status=\"200\",uri=\"/actuator/prometheus\",} 2.6356942\n# HELP tomcat_sessions_rejected_sessions_total  \n# TYPE tomcat_sessions_rejected_sessions_total counter\ntomcat_sessions_rejected_sessions_total{application=\"auth-service\",} 0.0\n# HELP jvm_threads_states_threads The current number of threads having NEW state\n# TYPE jvm_threads_states_threads gauge\njvm_threads_states_threads{application=\"auth-service\",state=\"timed-waiting\",} 11.0\njvm_threads_states_threads{application=\"auth-service\",state=\"terminated\",} 0.0\njvm_threads_states_threads{application=\"auth-service\",state=\"runnable\",} 9.0\njvm_threads_states_threads{application=\"auth-service\",state=\"new\",} 0.0\njvm_threads_states_threads{application=\"auth-service\",state=\"waiting\",} 15.0\njvm_threads_states_threads{application=\"auth-service\",state=\"blocked\",} 0.0\n# HELP jvm_memory_max_bytes The maximum amount of memory in bytes that can be used for memory management\n# TYPE jvm_memory_max_bytes gauge\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-nmethods'\",} 5832704.0\njvm_memory_max_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Old Gen\",} 4.269801472E9\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Compressed Class Space\",} 1.073741824E9\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-profiled nmethods'\",} 1.22945536E8\njvm_memory_max_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Survivor Space\",} -1.0\njvm_memory_max_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Eden Space\",} -1.0\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Metaspace\",} -1.0\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'profiled nmethods'\",} 1.2288E8\n# HELP hikaricp_connections_timeout_total Connection timeout total count\n# TYPE hikaricp_connections_timeout_total counter\nhikaricp_connections_timeout_total{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP jdbc_connections_idle  \n# TYPE jdbc_connections_idle gauge\njdbc_connections_idle{application=\"auth-service\",name=\"first\",} 10.0\n# HELP logback_events_total Number of error level events that made it to the logs\n# TYPE logback_events_total counter\nlogback_events_total{application=\"auth-service\",level=\"info\",} 59.0\nlogback_events_total{application=\"auth-service\",level=\"warn\",} 4.0\nlogback_events_total{application=\"auth-service\",level=\"error\",} 0.0\nlogback_events_total{application=\"auth-service\",level=\"trace\",} 0.0\nlogback_events_total{application=\"auth-service\",level=\"debug\",} 1372.0\n# HELP hikaricp_connections_acquire_seconds Connection acquire time\n# TYPE hikaricp_connections_acquire_seconds summary\nhikaricp_connections_acquire_seconds_count{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\nhikaricp_connections_acquire_seconds_sum{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP hikaricp_connections_acquire_seconds_max Connection acquire time\n# TYPE hikaricp_connections_acquire_seconds_max gauge\nhikaricp_connections_acquire_seconds_max{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP tomcat_sessions_active_current_sessions  \n# TYPE tomcat_sessions_active_current_sessions gauge\ntomcat_sessions_active_current_sessions{application=\"auth-service\",} 0.0\n# HELP jvm_buffer_memory_used_bytes An estimate of the memory that the Java virtual machine is using for this buffer pool\n# TYPE jvm_buffer_memory_used_bytes gauge\njvm_buffer_memory_used_bytes{application=\"auth-service\",id=\"mapped\",} 0.0\njvm_buffer_memory_used_bytes{application=\"auth-service\",id=\"direct\",} 24576.0\n# HELP process_uptime_seconds The uptime of the Java virtual machine\n# TYPE process_uptime_seconds gauge\nprocess_uptime_seconds{application=\"auth-service\",} 98.6\n# HELP process_cpu_usage The \"recent cpu usage\" for the Java Virtual Machine process\n# TYPE process_cpu_usage gauge\nprocess_cpu_usage{application=\"auth-service\",} 0.020672220022453006\n"

[Brian Candler]

How did you generate that output?  Can you try using "curl" to access the metrics endpoint directly?

[Xin Ma]

F:\workspace\guides>curl -v  http://127.0.0.1:8091/auth-service/actuator/prometheus

*   Trying 127.0.0.1...

* TCP_NODELAY set

* Connected to 127.0.0.1 (127.0.0.1) port 8091 (#0)

> GET /auth-service/actuator/prometheus HTTP/1.1

> Host: 127.0.0.1:8091

> User-Agent: curl/7.55.1

> Accept: */*

>

< HTTP/1.1 200

< Access-Control-Allow-Origin: *

< Access-Control-Allow-Credentials: true

< Access-Control-Allow-Methods: PUT, POST, GET, OPTIONS, DELETE

< Access-Control-Max-Age: 36000

< Access-Control-Allow-Headers: Accept, System-Code, Service-Org, Access-Token, Content-Type, Content-Disposition, Cache-Control, Expires, Referer, User-Agent, No-Cache, Pragma, X-Requested-With, If-Modified-Since, Last-Modified, Authorization

< XDomainRequestAllowed: 1

< Access-Control-Expose-Headers: Access-Token, System-Code,Service-Org, Content-Disposition, Authorization

< X-Content-Type-Options: nosniff

< X-XSS-Protection: 1; mode=block

< Cache-Control: no-cache, no-store, max-age=0, must-revalidate

< Pragma: no-cache

< Expires: 0

< X-Frame-Options: DENY

< Content-Type: text/plain; version=0.0.4;charset=utf-8

< Content-Length: 16222

< Date: Thu, 30 Apr 2020 02:31:16 GMT

<

"# HELP rabbitmq_connections  \n# TYPE rabbitmq_connections gauge\nrabbitmq_connections{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jvm_threads_live_threads The current number of live threads including both daemon and non-daemon threads\n# TYPE jvm_threads_live_threads gauge\njvm_threads_live_threads{application=\"auth-service\",} 30.0\n# HELP tomcat_sessions_expired_sessions_total  \n# TYPE tomcat_sessions_expired_sessions_total counter\ntomcat_sessions_expired_sessions_total{application=\"auth-service\",} 0.0\n# HELP rabbitmq_acknowledged_total  \n# TYPE rabbitmq_acknowledged_total counter\nrabbitmq_acknowledged_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jvm_buffer_count_buffers An estimate of the number of buffers in the pool\n# TYPE jvm_buffer_count_buffers gauge\njvm_buffer_count_buffers{application=\"auth-service\",id=\"mapped\",} 0.0\njvm_buffer_count_buffers{application=\"auth-service\",id=\"direct\",} 9.0\n# HELP hikaricp_connections_creation_seconds_max Connection creation time\n# TYPE hikaricp_connections_creation_seconds_max gauge\nhikaricp_connections_creation_seconds_max{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP hikaricp_connections_creation_seconds Connection creation time\n# TYPE hikaricp_connections_creation_seconds summary\nhikaricp_connections_creation_seconds_count{application=\"auth-service\",pool=\"HikariPool-1\",} 320.0\nhikaricp_connections_creation_seconds_sum{application=\"auth-service\",pool=\"HikariPool-1\",} 213.978\n# HELP hikaricp_connections_pending Pending threads\n# TYPE hikaricp_connections_pending gauge\nhikaricp_connections_pending{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP rabbitmq_unrouted_published_total  \n# TYPE rabbitmq_unrouted_published_total counter\nrabbitmq_unrouted_published_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP hikaricp_connections_idle Idle connections\n# TYPE hikaricp_connections_idle gauge\nhikaricp_connections_idle{application=\"auth-service\",pool=\"HikariPool-1\",} 10.0\n# HELP jdbc_connections_min  \n# TYPE jdbc_connections_min gauge\njdbc_connections_min{application=\"auth-service\",name=\"first\",} 10.0\n# HELP rabbitmq_rejected_total  \n# TYPE rabbitmq_rejected_total counter\nrabbitmq_rejected_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jvm_threads_daemon_threads The current number of live daemon threads\n# TYPE jvm_threads_daemon_threads gauge\njvm_threads_daemon_threads{application=\"auth-service\",} 25.0\n# HELP jvm_gc_pause_seconds Time spent in GC pause\n# TYPE jvm_gc_pause_seconds summary\njvm_gc_pause_seconds_count{action=\"end of minor GC\",application=\"auth-service\",cause=\"G1 Evacuation Pause\",} 10.0\njvm_gc_pause_seconds_sum{action=\"end of minor GC\",application=\"auth-service\",cause=\"G1 Evacuation Pause\",} 0.29\njvm_gc_pause_seconds_count{action=\"end of minor GC\",application=\"auth-service\",cause=\"Metadata GC Threshold\",} 1.0\njvm_gc_pause_seconds_sum{action=\"end of minor GC\",application=\"auth-service\",cause=\"Metadata GC Threshold\",} 0.021\n# HELP jvm_gc_pause_seconds_max Time spent in GC pause\n# TYPE jvm_gc_pause_seconds_max gauge\njvm_gc_pause_seconds_max{action=\"end of minor GC\",application=\"auth-service\",cause=\"G1 Evacuation Pause\",} 0.0\njvm_gc_pause_seconds_max{action=\"end of minor GC\",application=\"auth-service\",cause=\"Metadata GC Threshold\",} 0.0\n# HELP hikaricp_connections_active Active connections\n# TYPE hikaricp_connections_active gauge\nhikaricp_connections_active{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP rabbitmq_consumed_total  \n# TYPE rabbitmq_consumed_total counter\nrabbitmq_consumed_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP hikaricp_connections Total connections\n# TYPE hikaricp_connections gauge\nhikaricp_connections{application=\"auth-service\",pool=\"HikariPool-1\",} 10.0\n# HELP jvm_classes_loaded_classes The number of classes that are currently loaded in the Java virtual machine\n# TYPE jvm_classes_loaded_classes gauge\njvm_classes_loaded_classes{application=\"auth-service\",} 16349.0\n# HELP jdbc_connections_max  \n# TYPE jdbc_connections_max gauge\njdbc_connections_max{application=\"auth-service\",name=\"first\",} 10.0\n# HELP hikaricp_connections_max Max connections\n# TYPE hikaricp_connections_max gauge\nhikaricp_connections_max{application=\"auth-service\",pool=\"HikariPool-1\",} 10.0\n# HELP jvm_gc_max_data_size_bytes Max size of old generation memory pool\n# TYPE jvm_gc_max_data_size_bytes gauge\njvm_gc_max_data_size_bytes{application=\"auth-service\",} 4.269801472E9\n# HELP jvm_gc_memory_allocated_bytes_total Incremented for an increase in the size of the young generation memory pool after one GC to before the next\n# TYPE jvm_gc_memory_allocated_bytes_total counter\njvm_gc_memory_allocated_bytes_total{application=\"auth-service\",} 1.485832192E9\n# HELP jvm_threads_peak_threads The peak live thread count since the Java virtual machine started or peak was reset\n# TYPE jvm_threads_peak_threads gauge\njvm_threads_peak_threads{application=\"auth-service\",} 35.0\n# HELP tomcat_sessions_active_max_sessions  \n# TYPE tomcat_sessions_active_max_sessions gauge\ntomcat_sessions_active_max_sessions{application=\"auth-service\",} 0.0\n# HELP system_cpu_usage The \"recent cpu usage\" for the whole system\n# TYPE system_cpu_usage gauge\nsystem_cpu_usage{application=\"auth-service\",} 0.31671361118993935\n# HELP tomcat_sessions_created_sessions_total  \n# TYPE tomcat_sessions_created_sessions_total counter\ntomcat_sessions_created_sessions_total{application=\"auth-service\",} 0.0\n# HELP process_start_time_seconds Start time of the process since unix epoch.\n# TYPE process_start_time_seconds gauge\nprocess_start_time_seconds{application=\"auth-service\",} 1.588157126521E9\n# HELP jvm_gc_live_data_size_bytes Size of old generation memory pool after a full GC\n# TYPE jvm_gc_live_data_size_bytes gauge\njvm_gc_live_data_size_bytes{application=\"auth-service\",} 2.8757264E7\n# HELP rabbitmq_published_total  \n# TYPE rabbitmq_published_total counter\nrabbitmq_published_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP rabbitmq_failed_to_publish_total  \n# TYPE rabbitmq_failed_to_publish_total counter\nrabbitmq_failed_to_publish_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jdbc_connections_active  \n# TYPE jdbc_connections_active gauge\njdbc_connections_active{application=\"auth-service\",name=\"first\",} 0.0\n# HELP tomcat_sessions_alive_max_seconds  \n# TYPE tomcat_sessions_alive_max_seconds gauge\ntomcat_sessions_alive_max_seconds{application=\"auth-service\",} 0.0\n# HELP hikaricp_connections_min Min connections\n# TYPE hikaricp_connections_min gauge\nhikaricp_connections_min{application=\"auth-service\",pool=\"HikariPool-1\",} 10.0\n# HELP jvm_memory_used_bytes The amount of used memory\n# TYPE jvm_memory_used_bytes gauge\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-nmethods'\",} 1396992.0\njvm_memory_used_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Old Gen\",} 6.0637184E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Compressed Class Space\",} 1.1275616E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-profiled nmethods'\",} 9929472.0\njvm_memory_used_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Survivor Space\",} 1.048576E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Eden Space\",} 1.18489088E8\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Metaspace\",} 9.5251328E7\njvm_memory_used_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'profiled nmethods'\",} 2.1991168E7\n# HELP system_cpu_count The number of processors available to the Java virtual machine\n# TYPE system_cpu_count gauge\nsystem_cpu_count{application=\"auth-service\",} 4.0\n# HELP jvm_classes_unloaded_classes_total The total number of classes unloaded since the Java virtual machine has started execution\n# TYPE jvm_classes_unloaded_classes_total counter\njvm_classes_unloaded_classes_total{application=\"auth-service\",} 0.0\n# HELP jvm_buffer_total_capacity_bytes An estimate of the total capacity of the buffers in this pool\n# TYPE jvm_buffer_total_capacity_bytes gauge\njvm_buffer_total_capacity_bytes{application=\"auth-service\",id=\"mapped\",} 0.0\njvm_buffer_total_capacity_bytes{application=\"auth-service\",id=\"direct\",} 73728.0\n# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use\n# TYPE jvm_memory_committed_bytes gauge\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-nmethods'\",} 2555904.0\njvm_memory_committed_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Old Gen\",} 9.961472E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Compressed Class Space\",} 1.2189696E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-profiled nmethods'\",} 1.179648E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Survivor Space\",} 1.048576E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Eden Space\",} 1.58334976E8\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Metaspace\",} 9.764864E7\njvm_memory_committed_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'profiled nmethods'\",} 2.3396352E7\n# HELP rabbitmq_acknowledged_published_total  \n# TYPE rabbitmq_acknowledged_published_total counter\nrabbitmq_acknowledged_published_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP spring_boot_info A metric with a constant '1' value labeled by version from which spring boot application was built.\n# TYPE spring_boot_info gauge\nspring_boot_info{application=\"auth-service\",version=\"version\",} 1.0\n# HELP rabbitmq_channels  \n# TYPE rabbitmq_channels gauge\nrabbitmq_channels{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP build_info A metric with a constant '1' value labeled by version, revision, branch from which application was built.\n# TYPE build_info gauge\nbuild_info{app=\"app\",application=\"auth-service\",branch=\"branch\",revision=\"revision\",version=\"version\",} 1.0\n# HELP rabbitmq_not_acknowledged_published_total  \n# TYPE rabbitmq_not_acknowledged_published_total counter\nrabbitmq_not_acknowledged_published_total{application=\"auth-service\",name=\"rabbit\",} 0.0\n# HELP jvm_gc_memory_promoted_bytes_total Count of positive increases in the size of the old generation memory pool before GC to after GC\n# TYPE jvm_gc_memory_promoted_bytes_total counter\njvm_gc_memory_promoted_bytes_total{application=\"auth-service\",} 4.8362736E7\n# HELP hikaricp_connections_usage_seconds Connection usage time\n# TYPE hikaricp_connections_usage_seconds summary\nhikaricp_connections_usage_seconds_count{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\nhikaricp_connections_usage_seconds_sum{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP hikaricp_connections_usage_seconds_max Connection usage time\n# TYPE hikaricp_connections_usage_seconds_max gauge\nhikaricp_connections_usage_seconds_max{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP http_server_requests_seconds  \n# TYPE http_server_requests_seconds summary\nhttp_server_requests_seconds_count{application=\"auth-service\",exception=\"None\",method=\"GET\",outcome=\"SUCCESS\",status=\"200\",uri=\"/actuator/prometheus\",} 8.0\nhttp_server_requests_seconds_sum{application=\"auth-service\",exception=\"None\",method=\"GET\",outcome=\"SUCCESS\",status=\"200\",uri=\"/actuator/prometheus\",} 4.2322185\n# HELP http_server_requests_seconds_max  \n# TYPE http_server_requests_seconds_max gauge\nhttp_server_requests_seconds_max{application=\"auth-service\",exception=\"None\",method=\"GET\",outcome=\"SUCCESS\",status=\"200\",uri=\"/actuator/prometheus\",} 0.0\n# HELP tomcat_sessions_rejected_sessions_total  \n# TYPE tomcat_sessions_rejected_sessions_total counter\ntomcat_sessions_rejected_sessions_total{application=\"auth-service\",} 0.0\n# HELP jvm_threads_states_threads The current number of threads having NEW state\n# TYPE jvm_threads_states_threads gauge\njvm_threads_states_threads{application=\"auth-service\",state=\"timed-waiting\",} 7.0\njvm_threads_states_threads{application=\"auth-service\",state=\"terminated\",} 0.0\njvm_threads_states_threads{application=\"auth-service\",state=\"runnable\",} 10.0\njvm_threads_states_threads{application=\"auth-service\",state=\"new\",} 0.0\njvm_threads_states_threads{application=\"auth-service\",state=\"waiting\",} 13.0\njvm_threads_states_threads{application=\"auth-service\",state=\"blocked\",} 0.0\n# HELP jvm_memory_max_bytes The maximum amount of memory in bytes that can be used for memory management\n# TYPE jvm_memory_max_bytes gauge\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-nmethods'\",} 5832704.0\njvm_memory_max_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Old Gen\",} 4.269801472E9\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Compressed Class Space\",} 1.073741824E9\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'non-profiled nmethods'\",} 1.22945536E8\njvm_memory_max_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Survivor Space\",} -1.0\njvm_memory_max_bytes{application=\"auth-service\",area=\"heap\",id=\"G1 Eden Space\",} -1.0\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"Metaspace\",} -1.0\njvm_memory_max_bytes{application=\"auth-service\",area=\"nonheap\",id=\"CodeHeap 'profiled nmethods'\",} 1.2288E8\n# HELP hikaricp_connections_timeout_total Connection timeout total count\n# TYPE hikaricp_connections_timeout_total counter\nhikaricp_connections_timeout_total{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP jdbc_connections_idle  \n# TYPE jdbc_connections_idle gauge\njdbc_connections_idle{application=\"auth-service\",name=\"first\",} 10.0\n# HELP logback_events_total Number of error level events that made it to the logs\n# TYPE logback_events_total counter\nlogback_events_total{application=\"auth-service\",level=\"info\",} 218.0\nlogback_events_total{application=\"auth-service\",level=\"warn\",} 5.0\nlogback_events_total{application=\"auth-service\",level=\"error\",} 3.0\nlogback_events_total{application=\"auth-service\",level=\"trace\",} 0.0\nlogback_events_total{application=\"auth-service\",level=\"debug\",} 2025.0\n# HELP hikaricp_connections_acquire_seconds Connection acquire time\n# TYPE hikaricp_connections_acquire_seconds summary\nhikaricp_connections_acquire_seconds_count{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\nhikaricp_connections_acquire_seconds_sum{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP hikaricp_connections_acquire_seconds_max Connection acquire time\n# TYPE hikaricp_connections_acquire_seconds_max gauge\nhikaricp_connections_acquire_seconds_max{application=\"auth-service\",pool=\"HikariPool-1\",} 0.0\n# HELP tomcat_sessions_active_current_sessions  \n# TYPE tomcat_sessions_active_current_sessions gauge\ntomcat_sessions_active_current_sessions{application=\"auth-service\",} 0.0\n# HELP jvm_buffer_memory_used_bytes An estimate of the memory that the Java virtual machine is using for this buffer pool\n# TYPE jvm_buffer_memory_used_bytes gauge\njvm_buffer_memory_used_bytes{application=\"auth-service\",id=\"mapped\",} 0.0\njvm_buffer_memory_used_bytes{application=\"auth-service\",id=\"direct\",} 73728.0\n# HELP process_uptime_seconds The uptime of the Java virtual machine\n# TYPE process_uptime_seconds gauge\nprocess_uptime_seconds{application=\"auth-service\",} 56749.175\n# HELP process_cpu_usage The \"recent cpu usage\" for the Java Virtual Machine process\n# TYPE process_cpu_usage gauge\nprocess_cpu_usage{application=\"auth-service\",} 0.0030914718745901947\n"* Connection #0 to host 127.0.0.1 left intact

[Brian Candler]

Yep, that looks pretty broken.  Suggest you raise an issue directly with the code author (i.e. springboot, or the exporter if that's a separate piece of code)