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Allow the option to make producers thread local (apache#7764)
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If a function has many threads who are doing context.newOutputMessage().send(), there could be a lot of contention due to big synchronization blocks in the ProducerImpl. By allowing functions to use thread local producers, this synchronization can be avoided leading to increased performance.
This pr adds the configurability of using thread local producers in functions and sources

Co-authored-by: Sanjeev Kulkarni <[email protected]>
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@srkukarni
srkukarni and Sanjeev Kulkarni authored Aug 10, 2020
1 parent bd09aa0 commit a3eb556
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Showing 8 changed files with 80 additions and 40 deletions.
1 change: 1 addition & 0 deletions pulsar-common/src/main/java/org/apache/pulsar/common/functions/ProducerConfig.java
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Original file line number Diff line number Diff line change
Expand Up @@ -35,4 +35,5 @@
public class ProducerConfig {
private Integer maxPendingMessages;
private Integer maxPendingMessagesAcrossPartitions;
private Boolean useThreadLocalProducers;
}
40 changes: 30 additions & 10 deletions ...ar-functions/instance/src/main/java/org/apache/pulsar/functions/instance/ContextImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,7 @@ class ContextImpl implements Context, SinkContext, SourceContext {

private PulsarClient client;
private Map<String, Producer<?>> publishProducers;
private ThreadLocal<Map<String, Producer<?>>> tlPublishProducers;
private ProducerBuilderImpl<?> producerBuilder;

private final TopicSchema topicSchema;
Expand Down Expand Up @@ -102,19 +103,25 @@ public ContextImpl(InstanceConfig config, Logger logger, PulsarClient client,
this.config = config;
this.logger = logger;
this.client = client;
this.publishProducers = new HashMap<>();
this.topicSchema = new TopicSchema(client);
this.statsManager = statsManager;

this.producerBuilder = (ProducerBuilderImpl<?>) client.newProducer().blockIfQueueFull(true).enableBatching(true)
.batchingMaxPublishDelay(1, TimeUnit.MILLISECONDS);
boolean useThreadLocalProducers = false;
if (config.getFunctionDetails().getSink().getProducerSpec() != null) {
if (config.getFunctionDetails().getSink().getProducerSpec().getMaxPendingMessages() != 0) {
this.producerBuilder.maxPendingMessages(config.getFunctionDetails().getSink().getProducerSpec().getMaxPendingMessages());
}
if (config.getFunctionDetails().getSink().getProducerSpec().getMaxPendingMessagesAcrossPartitions() != 0) {
this.producerBuilder.maxPendingMessagesAcrossPartitions(config.getFunctionDetails().getSink().getProducerSpec().getMaxPendingMessagesAcrossPartitions());
}
useThreadLocalProducers = config.getFunctionDetails().getSink().getProducerSpec().getUseThreadLocalProducers();
}
if (useThreadLocalProducers) {
tlPublishProducers = new ThreadLocal<>();
} else {
publishProducers = new HashMap<>();
}

if (config.getFunctionDetails().getUserConfig().isEmpty()) {
Expand Down Expand Up @@ -413,7 +420,17 @@ public void recordMetric(String metricName, double value) {
}

private <O> Producer<O> getProducer(String topicName, Schema<O> schema) throws PulsarClientException {
Producer<O> producer = (Producer<O>) publishProducers.get(topicName);
Producer<O> producer;
if (tlPublishProducers != null) {
Map<String, Producer<?>> producerMap = tlPublishProducers.get();
if (producerMap == null) {
producerMap = new HashMap<>();
tlPublishProducers.set(producerMap);
}
producer = (Producer<O>) producerMap.get(topicName);
} else {
producer = (Producer<O>) publishProducers.get(topicName);
}

if (producer == null) {

Expand All @@ -438,16 +455,19 @@ private <O> Producer<O> getProducer(String topicName, Schema<O> schema) throws P
this.config.getInstanceId()))
.create();

Producer<O> existingProducer = (Producer<O>) publishProducers.putIfAbsent(topicName, newProducer);

if (existingProducer != null) {
// The value in the map was not updated after the concurrent put
newProducer.close();
producer = existingProducer;
if (tlPublishProducers != null) {
tlPublishProducers.get().put(topicName, newProducer);
} else {
producer = newProducer;
Producer<O> existingProducer = (Producer<O>) publishProducers.putIfAbsent(topicName, newProducer);

if (existingProducer != null) {
// The value in the map was not updated after the concurrent put
newProducer.close();
producer = existingProducer;
} else {
producer = newProducer;
}
}

}
return producer;
}
Expand Down
67 changes: 37 additions & 30 deletions pulsar-functions/instance/src/main/python/Function_pb2.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@
syntax='proto3',
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create_key=_descriptor._internal_create_key,
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\x01(\t*O\n\x14ProcessingGuarantees\x12\x10\n\x0c\x41TLEAST_ONCE\x10\x00\x12\x0f\n\x0b\x41TMOST_ONCE\x10\x01\x12\x14\n\x10\x45\x46\x46\x45\x43TIVELY_ONCE\x10\x02*<\n\x10SubscriptionType\x12\n\n\x06SHARED\x10\x00\x12\x0c\n\x08\x46\x41ILOVER\x10\x01\x12\x0e\n\nKEY_SHARED\x10\x02*0\n\x14SubscriptionPosition\x12\n\n\x06LATEST\x10\x00\x12\x0c\n\x08\x45\x41RLIEST\x10\x01*)\n\rFunctionState\x12\x0b\n\x07RUNNING\x10\x00\x12\x0b\n\x07STOPPED\x10\x01\x42-\n!org.apache.pulsar.functions.protoB\x08\x46unctionb\x06proto3'
)

_PROCESSINGGUARANTEES = _descriptor.EnumDescriptor(
Expand Down Expand Up @@ -66,8 +66,8 @@
],
containing_type=None,
serialized_options=None,
serialized_start=3174,
serialized_end=3253,
serialized_start=3207,
serialized_end=3286,
)
_sym_db.RegisterEnumDescriptor(_PROCESSINGGUARANTEES)

Expand Down Expand Up @@ -97,8 +97,8 @@
],
containing_type=None,
serialized_options=None,
serialized_start=3255,
serialized_end=3315,
serialized_start=3288,
serialized_end=3348,
)
_sym_db.RegisterEnumDescriptor(_SUBSCRIPTIONTYPE)

Expand All @@ -123,8 +123,8 @@
],
containing_type=None,
serialized_options=None,
serialized_start=3317,
serialized_end=3365,
serialized_start=3350,
serialized_end=3398,
)
_sym_db.RegisterEnumDescriptor(_SUBSCRIPTIONPOSITION)

Expand All @@ -149,8 +149,8 @@
],
containing_type=None,
serialized_options=None,
serialized_start=3367,
serialized_end=3408,
serialized_start=3400,
serialized_end=3441,
)
_sym_db.RegisterEnumDescriptor(_FUNCTIONSTATE)

Expand Down Expand Up @@ -695,6 +695,13 @@
message_type=None, enum_type=None, containing_type=None,
is_extension=False, extension_scope=None,
serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key),
_descriptor.FieldDescriptor(
name='useThreadLocalProducers', full_name='proto.ProducerSpec.useThreadLocalProducers', index=2,
number=3, type=8, cpp_type=7, label=1,
has_default_value=False, default_value=False,
message_type=None, enum_type=None, containing_type=None,
is_extension=False, extension_scope=None,
serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key),
],
extensions=[
],
Expand All @@ -708,7 +715,7 @@
oneofs=[
],
serialized_start=1337,
serialized_end=1423,
serialized_end=1456,
)


Expand Down Expand Up @@ -746,8 +753,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=1903,
serialized_end=1964,
serialized_start=1936,
serialized_end=1997,
)

_SOURCESPEC_INPUTSPECSENTRY = _descriptor.Descriptor(
Expand Down Expand Up @@ -784,8 +791,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=1966,
serialized_end=2036,
serialized_start=1999,
serialized_end=2069,
)

_SOURCESPEC = _descriptor.Descriptor(
Expand Down Expand Up @@ -899,8 +906,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=1426,
serialized_end=2036,
serialized_start=1459,
serialized_end=2069,
)


Expand Down Expand Up @@ -1077,8 +1084,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=2039,
serialized_end=2515,
serialized_start=2072,
serialized_end=2548,
)


Expand Down Expand Up @@ -1116,8 +1123,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=2517,
serialized_end=2589,
serialized_start=2550,
serialized_end=2622,
)


Expand Down Expand Up @@ -1155,8 +1162,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=2885,
serialized_end=2960,
serialized_start=2918,
serialized_end=2993,
)

_FUNCTIONMETADATA = _descriptor.Descriptor(
Expand Down Expand Up @@ -1221,8 +1228,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=2592,
serialized_end=2960,
serialized_start=2625,
serialized_end=2993,
)


Expand Down Expand Up @@ -1260,8 +1267,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=2962,
serialized_end=3022,
serialized_start=2995,
serialized_end=3055,
)


Expand Down Expand Up @@ -1299,8 +1306,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=3024,
serialized_end=3105,
serialized_start=3057,
serialized_end=3138,
)


Expand Down Expand Up @@ -1338,8 +1345,8 @@
extension_ranges=[],
oneofs=[
],
serialized_start=3107,
serialized_end=3172,
serialized_start=3140,
serialized_end=3205,
)

_FUNCTIONDETAILS.fields_by_name['processingGuarantees'].enum_type = _PROCESSINGGUARANTEES
Expand Down
1 change: 1 addition & 0 deletions pulsar-functions/proto/src/main/proto/Function.proto
View file
Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,7 @@ message ConsumerSpec {
message ProducerSpec {
int32 maxPendingMessages = 1;
int32 maxPendingMessagesAcrossPartitions = 2;
bool useThreadLocalProducers = 3;
}

message SourceSpec {
Expand Down
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