We have a 30-node cluster.Unfortunately, this is also our production cluster
and there's no HDFS as it is a dedicated Flume cluster.We have installed Ambari
+ Storm + Kafka (HDP) on a cluster on which we have production data being
flumed.The flume data is being sent to an HDFS cluster which is a little
overloaded, so we want to send flume data to Kafka and then "throttle" the data
being loaded into the HDFS cluster.
But you have given me an idea - maybe I can setup a new HBase file location so
that I can do away with HBase data corruption, if any.
It will take me some time to do that, will let you know once I have tried it
out.
Thanks,jayesh
From: Siddharth Wagle <[email protected]>
To: "[email protected]" <[email protected]>; Jayesh Thakrar
<[email protected]>
Sent: Wednesday, May 6, 2015 10:42 PM
Subject: Re: Kafka broker metrics not appearing in REST API
#yiv0660124678 #yiv0660124678 --P{margin-top:0;margin-bottom:0;}#yiv0660124678
--P {margin-top:0;margin-bottom:0;}#yiv0660124678 How big is your cluster in
terms of number of nodes?You can tune settings for HBase based on cluster size.
Following are the instructions for writing metrics to HDFS instead of local FS.
ams-site::: timeline.metrics.service.operation.mode = distributed
ams-hbase-site:::hbase.rootdir =
hdfs://<namenode-host>:8020/amshbasehbase.cluster.distributed = true
-Sid
From: Jayesh Thakrar <[email protected]>
Sent: Wednesday, May 06, 2015 8:30 PM
To: [email protected]; Siddharth Wagle; Jayesh Thakrar
Subject: Re: Kafka broker metrics not appearing in REST API More info....
I was doing some "stress-testing" and interestingly, the Metrics Collector
crashed 2 times and I had to restart it (don't like a file-based HBase for the
metrics collector, but not very confident of configuring the system to point to
an existing HBase cluster).
Also, after this email thread, I looked up the metrics collector logs and see
errors like this -
METRIC_RECORD' at
region=METRIC_RECORD,,1429966316307.947cfa22f884d035c09fe804b1f5402c.,
hostname=dtord01flm03p.dc.dotomi.net,60455,1429737430103,
seqNum=24393013:09:37,619 INFO [phoenix-1-thread-349921] RpcRetryingCaller:129
- Call exception, tries=11, retries=35, started=835564 ms ago, cancelled=false,
msg=row
'kafka.network.RequestMetrics.Metadata-RequestsPerSec.1MinuteRate^@dtord01flm27p.dc.dotomi.net^@^@^@^AL��:�kafka_broker'
on table 'METRIC_RECORD' at
region=METRIC_RECORD,kafkark.RequestMetrics.Metadata-RequestsPerSec.1MinuteRate\x00dtord01flm27p.dc.dotomi.net\x00\x00\x00\x01L\xED\xED:\xE5kafka_broker,1429966316307.d488f5e58d54c3251cb81fdfa475dd45.,
hostname=dtord01flm03p.dc.dotomi.net,60455,1429737430103,
seqNum=24393113:10:58,082 INFO [phoenix-1-thread-349920] RpcRetryingCaller:129
- Call exception, tries=12, retries=35, started=916027 ms ago, cancelled=false,
msg=row '' on table 'METRIC_RECORD' at
region=METRIC_RECORD,,1429966316307.947cfa22f884d035c09fe804b1f5402c.,
hostname=dtord01flm03p.dc.dotomi.net,60455,1429737430103,
seqNum=24393013:10:58,082 INFO [phoenix-1-thread-349921] RpcRetryingCaller:129
- Call exception, tries=12, retries=35, started=916027 ms ago, cancelled=false,
msg=row
'kafka.network.RequestMetrics.Metadata-RequestsPerSec.1MinuteRate^@dtord01flm27p.dc.dotomi.net^@^@^@^AL��:�kafka_broker'
on table 'METRIC_RECORD' at
region=METRIC_RECORD,kafkark.RequestMetrics.Metadata-RequestsPerSec.1MinuteRate\x00dtord01flm27p.dc.dotomi.net\x00\x00\x00\x01L\xED\xED:\xE5kafka_broker,1429966316307.d488f5e58d54c3251cb81fdfa475dd45.,
hostname=dtord01flm03p.dc.dotomi.net,60455,1429737430103,
seqNum=24393113:10:58,112 ERROR [Thread-25] TimelineMetricAggregator:221 -
Exception during aggregating
metrics.org.apache.phoenix.exception.PhoenixIOException:
org.apache.phoenix.exception.PhoenixIOException: Failed after attempts=36,
exceptions:Sat Apr 25 13:10:58 UTC 2015, null, java.net.SocketTimeoutException:
callTimeout=900000, callDuration=938097: row '' on table 'METRIC_RECORD' at
region=METRIC_RECORD,,1429966316307.947cfa22f884d035c09fe804b1f5402c.,
hostname=dtord01flm03p.dc.dotomi.net,60455,1429737430103, seqNum=243930
at
org.apache.phoenix.util.ServerUtil.parseServerException(ServerUtil.java:107)
at
org.apache.phoenix.iterate.ParallelIterators.getIterators(ParallelIterators.java:527)
at
org.apache.phoenix.iterate.MergeSortResultIterator.getIterators(MergeSortResultIterator.java:48)
at
org.apache.phoenix.iterate.MergeSortResultIterator.minIterator(MergeSortResultIterator.java:63)
at
org.apache.phoenix.iterate.MergeSortResultIterator.next(MergeSortResultIterator.java:90)
at
org.apache.phoenix.iterate.MergeSortTopNResultIterator.next(MergeSortTopNResultIterator.java:87)
at
org.apache.phoenix.jdbc.PhoenixResultSet.next(PhoenixResultSet.java:739)
at
org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.TimelineMetricAggregator.aggregateMetricsFromResultSet(TimelineMetricAggregator.java:104)
at
org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.TimelineMetricAggregator.aggregate(TimelineMetricAggregator.java:72)
at
org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.AbstractTimelineAggregator.doWork(AbstractTimelineAggregator.java:217)
at
org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.AbstractTimelineAggregator.runOnce(AbstractTimelineAggregator.java:94)
at
org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.AbstractTimelineAggregator.run(AbstractTimelineAggregator.java:70)
From: Jayesh Thakrar <[email protected]>
To: Siddharth Wagle <[email protected]>; "[email protected]"
<[email protected]>
Sent: Wednesday, May 6, 2015 10:07 PM
Subject: Re: Kafka broker metrics not appearing in REST API
Hi Siddharth,
Yes, I am using Ambari 2.0 with Ambari Metrics service.The interesting thing is
that I got them for some time and not anymore.And I also know that the metrics
are being collected since i can see them on the dashboard.Any pointer for
troubleshooting?
And btw, it would be nice to have a count of messages received and not a
computed metric count / min.TSDB does a good job of giving me cumulative and
rate-per-sec graphs and numbers.
Thanks in advance,Jayesh
From: Siddharth Wagle <[email protected]>
To: "[email protected]" <[email protected]>; Jayesh Thakrar
<[email protected]>
Sent: Wednesday, May 6, 2015 10:03 PM
Subject: Re: Kafka broker metrics not appearing in REST API
#yiv0660124678 #yiv0660124678 -- --P
{margin-top:0;margin-bottom:0;}#yiv0660124678 Hi Jayesh,
Are you using Ambari 2.0 with Ambari Metrics service?
BR,Sid
From: Jayesh Thakrar <[email protected]>
Sent: Wednesday, May 06, 2015 7:53 PM
To: [email protected]
Subject: Kafka broker metrics not appearing in REST API Hi,
I have installed 2 clusters with Ambari and Storm and Kafka.After the install,
I was able to get metrics for both Storm and Kafka via REST API.This worked
fine for a week, but since the past 2 days, I have not been getting Kafka
metrics.
I need the metrics to push to an OpenTSDB cluster.I do get host metrics and
Nimbus metrics but not KAFKA_BROKER metrics.
I did have maintenance turned on for some time, but maintenance is turned off
now.
[jthakrar@dtord01hdp0101d ~]$ curl --user admin:admin
'http://dtord01flm01p:8080/api/v1/clusters/ord_flume_kafka_prod/components/NIMBUS?fields=metrics'{
"href" :
"http://dtord01flm01p:8080/api/v1/clusters/ord_flume_kafka_prod/components/NIMBUS?fields=metrics";,
"ServiceComponentInfo" : { "cluster_name" : "ord_flume_kafka_prod",
"component_name" : "NIMBUS", "service_name" : "STORM" }, "metrics" : {
"storm" : { "nimbus" : { "freeslots" : 54.0, "supervisors" :
27.0, "topologies" : 0.0, "totalexecutors" : 0.0,
"totalslots" : 54.0, "totaltasks" : 0.0, "usedslots" : 0.0 }
} }}
[jthakrar@dtord01hdp0101d ~]$ curl --user admin:admin
'http://dtord01flm01p:8080/api/v1/clusters/ord_flume_kafka_prod/components/KAFKA_BROKER?fields=metrics'{
"href" :
"http://dtord01flm01p:8080/api/v1/clusters/ord_flume_kafka_prod/components/KAFKA_BROKER?fields=metrics";,
"ServiceComponentInfo" : { "cluster_name" : "ord_flume_kafka_prod",
"component_name" : "KAFKA_BROKER", "service_name" : "KAFKA" }}
[jthakrar@dtord01hdp0101d ~]$ curl --user admin:admin
'http://dtord01flm01p:8080/api/v1/clusters/ord_flume_kafka_prod/components/SUPERVISOR?fields=metrics'{
"href" :
"http://dtord01flm01p:8080/api/v1/clusters/ord_flume_kafka_prod/components/SUPERVISOR?fields=metrics";,
"ServiceComponentInfo" : { "cluster_name" : "ord_flume_kafka_prod",
"component_name" : "SUPERVISOR", "service_name" : "STORM" }
