thinker0 opened a new issue, #3817:
URL: https://github.com/apache/incubator-heron/issues/3817
**Describe the bug**
HeathManager requires backward compatibility between the old version and the
new version.
```
# version-0.20.4
@router.get("/metricstimeline",
response_model=metricstimeline.MetricsTimeline)
# version-0.20.5
@router.get("/metrics/timeline",
response_model=metricstimeline.MetricsTimeline)
```
**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error
**Expected behavior**
Since I use both versions, there is a problem that HealthManager dies when
the topology of the lower version calls the tracker of the upper version.
**Screenshots**
```
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.healthmgr.sensors.TrackerMetricsProvider: Did not get any
metrics from tracker for
__stmgr__:__time_spent_back_pressure_by_compid/container_23_kafka-publisher_323
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.healthmgr.sensors.TrackerMetricsProvider: Did not get any
metrics from tracker for
__stmgr__:__time_spent_back_pressure_by_compid/container_15_kafka-publisher_315
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.healthmgr.sensors.TrackerMetricsProvider: Did not get any
metrics from tracker for
__stmgr__:__time_spent_back_pressure_by_compid/container_8_kafka-publisher_308
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.healthmgr.sensors.TrackerMetricsProvider: Did not get any
metrics from tracker for
__stmgr__:__time_spent_back_pressure_by_compid/container_25_kafka-publisher_325
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.healthmgr.sensors.TrackerMetricsProvider: Did not get any
metrics from tracker for
__stmgr__:__time_spent_back_pressure_by_compid/container_5_kafka-publisher_305
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.healthmgr.sensors.TrackerMetricsProvider: Did not get any
metrics from tracker for
__stmgr__:__time_spent_back_pressure_by_compid/container_7_kafka-publisher_307
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.common.network.SocketChannelHelper: Forcing to flush data to
socket with best effort.
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.common.network.HeronClient: To stop the HeronClient.
[2022-04-12 21:43:52 +0900] [INFO]
org.apache.heron.healthmgr.HealthManagerMetrics: SimpleMetricsManagerClient
exits
[2022-04-12 21:43:52 +0900] [STDERR] stderr: Exception in thread "main"
[2022-04-12 21:43:52 +0900] [STDERR] stderr:
java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException:
json string can not be null or empty
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
org.apache.heron.healthmgr.HealthManager.main(HealthManager.java:242)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: Caused by:
java.lang.IllegalArgumentException: json string can not be null or empty
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
com.jayway.jsonpath.internal.Utils.notEmpty(Utils.java:386)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
com.jayway.jsonpath.internal.JsonContext.parse(JsonContext.java:81)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
com.jayway.jsonpath.JsonPath.parse(JsonPath.java:596)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
org.apache.heron.healthmgr.sensors.TrackerMetricsProvider.parse(TrackerMetricsProvider.java:94)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
org.apache.heron.healthmgr.sensors.TrackerMetricsProvider.getMeasurements(TrackerMetricsProvider.java:81)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
com.microsoft.dhalion.api.MetricsProvider.getMeasurements(MetricsProvider.java:59)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
org.apache.heron.healthmgr.sensors.BackPressureSensor.fetch(BackPressureSensor.java:83)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
com.microsoft.dhalion.policy.HealthPolicyImpl.executeSensors(HealthPolicyImpl.java:115)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
com.microsoft.dhalion.policy.PoliciesExecutor.lambda$start$2(PoliciesExecutor.java:81)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[2022-04-12 21:43:52 +0900] [STDERR] stderr: at
java.base/java.lang.Thread.run(Thread.java:833)
```
**Operating System**
- OS: CentOS7
- Version 0.20.4, 0.20.5
**Additional context**
If tracker supports two APIs, it should be done.
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