SUBRAMANYA SURESH created FLINK-9166:
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Summary: Performance issue with Flink SQL
Key: FLINK-9166
URL: https://issues.apache.org/jira/browse/FLINK-9166
Project: Flink
Issue Type: Bug
Components: Table API & SQL
Affects Versions: 1.4.2
Reporter: SUBRAMANYA SURESH
With a high number of Flink SQL queries (100 of below), the Flink command line
client fails with a "JobManager did not respond within 600000 ms" on a Yarn
cluster.
JobManager logs has nothing after the last TaskManager started except DEBUG
logs with "job with ID 5cd95f89ed7a66ec44f2d19eca0592f7 not found in
JobManager", indicating its likely stuck (creating the ExecutionGraph?).
The same works as standalone java program locally (high CPU initially)
Note: Each Row in structStream contains 515 columns (many end up null)
including a column that has the raw message.
In the YARN cluster we specify 18GB for TaskManager, 18GB for the JobManager, 5
slots each and parallelism of 725 (partitions in our Kafka source).
*Query:*
{code:java}
select count (*), 'idnumber' as criteria, Environment, CollectedTimestamp,
EventTimestamp, RawMsg, Source
from structStream
where Environment='MyEnvironment' and Rule='MyRule' and LogType='MyLogType'
and Outcome='Success'
group by tumble(proctime, INTERVAL '1' SECOND), Environment,
CollectedTimestamp, EventTimestamp, RawMsg, Source
{code}
*Code:*
{code:java}
public static void main(String[] args) throws Exception {
FileSystems.newFileSystem(KafkaReadingStreamingJob.class.getResource(WHITELIST_CSV).toURI(),
new HashMap<>());
final StreamExecutionEnvironment streamingEnvironment =
getStreamExecutionEnvironment();
final StreamTableEnvironment tableEnv =
TableEnvironment.getTableEnvironment(streamingEnvironment);
final DataStream<Row> structStream =
getKafkaStreamOfRows(streamingEnvironment);
tableEnv.registerDataStream("structStream", structStream);
tableEnv.scan("structStream").printSchema();
for (int i = 0; i < 100; i++){
for (String query : Queries.sample){
// Queries.sample has one query that is above.
Table selectQuery = tableEnv.sqlQuery(query);
DataStream<Row> selectQueryStream = tableEnv.toAppendStream(selectQuery,
Row.class);
selectQueryStream.print();
}
}
// execute program
streamingEnvironment.execute("Kafka Streaming SQL");
}
private static DataStream<Row> getKafkaStreamOfRows(StreamExecutionEnvironment
environment) throws Exception {
Properties properties = getKafkaProperties();
// TestDeserializer deserializes the JSON to a ROW of string columns (515)
// and also adds a column for the raw message.
FlinkKafkaConsumer011 consumer = new
FlinkKafkaConsumer011(KAFKA_TOPIC_TO_CONSUME, new
TestDeserializer(getRowTypeInfo()), properties);
DataStream<Row> stream = environment.addSource(consumer);
return stream;
}
private static RowTypeInfo getRowTypeInfo() throws Exception {
// This has 515 fields.
List<String> fieldNames = DDIManager.getDDIFieldNames();
fieldNames.add("rawkafka"); // rawMessage added by TestDeserializer
fieldNames.add("proctime");
// Fill typeInformationArray with StringType to all but the last field which
is of type Time
.....
return new RowTypeInfo(typeInformationArray, fieldNamesArray);
}
private static StreamExecutionEnvironment getStreamExecutionEnvironment()
throws IOException {
final StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime);
env.enableCheckpointing(60000);
env.setStateBackend(new FsStateBackend(CHECKPOINT_DIR));
env.setParallelism(725);
return env;
}
{code}
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