#### `EventReceiverFirehoseFactory`
Fixed several concurrency bugs in `EventReceiverFirehoseFactory`:
- Race condition over putting an entry into `producerSequences` in `checkProducerSequence()`.
- `Stopwatch` used to measure time across threads, but it's a non-thread-safe class.
- Use `System.nanoTime()` instead of `System.currentTimeMillis()` because the latter are [not suitable](https://stackoverflow.com/a/351571/648955) for measuring time intervals.
- `close()` was not synchronized by could be called from multiple threads concurrently.
Removed unnecessary `readLock` (protecting `hasMore()` and `nextRow()` which are always called from a single thread). Removed unnecessary `volatile` modifiers.
Documented threading model and concurrent control flow of `EventReceiverFirehose` instances.
**Important:** please read the updated Javadoc for `EventReceiverFirehose.addAll()`. It allows events from different requests (batches) to be interleaved in the buffer. Is this OK?
#### `TimedShutoffFirehoseFactory`
- Fixed a race condition that was possible because `close()` that was not properly synchronized.
Documented threading model and concurrent control flow of `TimedShutoffFirehose` instances.
#### `Firehose`
Refined concurrency contract of `Firehose` based on `EventReceiverFirehose` implementation. Importantly, now it states that `close()` doesn't affect `hasMore()` and `nextRow()` and could be called concurrently with them. In other words, specified that `close()` is for "row supply" side rather than "row consume" side. However, I didn't check that other `Firehose` implementatations adhere to this contract.
<hr>
This issue is the result of reviewing `EventReceiverFirehose` and `TimedShutoffFirehose` using [this checklist](https://medium.com/@leventov/code-review-checklist-java-concurrency-49398c326154).
Previously, the test validated that the data source that we ingested from still
had the same query responses that it did before the second ingestion. This is
less useful than validating queries against the newly created data source.
The new queries file differs from the old one in that its maxTime is earlier due
to the interval selected by the reindex, and in that it does not query for the
dropped metric "count".
* add license checker to web-console to ensure npm dependencies are apache license compatible
* add generate licenses file
* update check to remove excludes due to blueprintjs downgrade
* Fix two SeekableStream serde issues.
1) Fix backwards-compatibility serde for SeekableStreamPartitions. It is needed
for split 0.13 / 0.14 clusters to work properly during a rolling update.
2) Abstract classes don't need JsonCreator constructors; remove them.
* Comment fixes.
* [#1332] Fix - select failing if milis used for idx.
* Formating correction.
* Address comment: throw original exception.
* Using constant values in tests
- Try converting to Integer and then multiply by 1000L to achieve milis.
- If not successful try converting to Long or rethrow original
exception.
* DateTime#of has to support "2011-01-01T00:00:00"
- in addition to seconds and milisecs, this method currently supports
even a date string.
* Handle only milisec timestamps and ISO8601 strings
* Added checkstyle for "Methods starting with Capital Letters" and changed the method names violating this.
* Un-abbreviate the method names in the calcite tests
* Fixed checkstyle errors
* Changed asserts position in the code
IndexTask had special-cased code to properly send a TaskToolbox to a
IngestSegmentFirehoseFactory that's nested inside a CombiningFirehoseFactory,
but ParallelIndexSubTask didn't.
This change refactors IngestSegmentFirehoseFactory so that it doesn't need a
TaskToolbox; it instead gets a CoordinatorClient and a SegmentLoaderFactory
directly injected into it.
This also refactors SegmentLoaderFactory so it doesn't depend on
an injectable SegmentLoaderConfig, since its only method always
replaces the preconfigured SegmentLoaderConfig anyway.
This makes it possible to use SegmentLoaderFactory without setting
druid.segmentCaches.locations to some dummy value.
Another goal of this PR is to make it possible for IngestSegmentFirehoseFactory
to list data segments outside of connect() --- specifically, to make it a
FiniteFirehoseFactory which can query the coordinator in order to calculate its
splits. See #7048.
This also adds missing datasource name URL-encoding to an API used by
CoordinatorBasedSegmentHandoffNotifier.
* Remove DataSegmentFinder, InsertSegmentToDb, and descriptor.json file
* delete descriptor.file when killing segments
* fix test
* Add doc for ha
* improve warning
* index_parallel: support !appendToExisting with no explicit intervals
This enables ParallelIndexSupervisorTask to dynamically request locks at runtime
if it is run without explicit intervals in the granularity spec and with
appendToExisting set to false. Previously, it behaved as if appendToExisting
was set to true, which was undocumented and inconsistent with IndexTask and
Hadoop indexing.
Also, when ParallelIndexSupervisorTask allocates segments in the explicit
interval case, fail if its locks on the interval have been revoked.
Also make a few other additions/clarifications to native ingestion docs.
Fixes#6989.
* Review feedback.
PR description on GitHub updated to match.
* Make native batch ingestion partitions start at 0
* Fix to previous commit
* Unit test. Verified to fail without the other commits on this branch.
* Another round of review
* Slightly scarier warning
* bugfix: when building materialized-view, if taskCount >1, may cause ConcurrentModificationException
* remove entry after iteration instead of using ConcurrentMap, and add unit test
* small change
* modify unit test for coverage
* remove unused method
* document middle manager api
* re-arrange
* correction
* document more missing overlord api calls, minor re-arrange of some code i was referencing
* fix it
* this will fix it
* fixup
* link to other docs
* Support kafka transactional topics
* update kafka to version 2.0.0
* Remove the skipOffsetGaps option since it's not used anymore
* Adjust kafka consumer to use transactional semantics
* Update tests
* Remove unused import from test
* Fix compilation
* Invoke transaction api to fix a unit test
* temporary modification of travis.yml for debugging
* another attempt to get travis tasklogs
* update kafka to 2.0.1 at all places
* Remove druid-kafka-eight dependency from integration-tests, remove the kafka firehose test and deprecate kafka-eight classes
* Add deprecated in docs for kafka-eight and kafka-simple extensions
* Remove skipOffsetGaps and code changes for transaction support
* Fix indentation
* remove skipOffsetGaps from kinesis
* Add transaction api to KafkaRecordSupplierTest
* Fix indent
* Fix test
* update kafka version to 2.1.0
* Fix the bug with num_rows in sys.segments
* Fix segmentMetadataInfo update in DruidSchema
* Add numRows to SegmentMetadataHolder builder's constructor, so it's not overwritten
* Rename SegSegmentSignature to setSegmentMetadataHolder and fix it so nested map is appended instead of recreated
* Replace Map<String, Set<String>> segmentServerMap with Set<String> for num_replica
* Remove unnecessary code and update test
* Add unit test for num_rows
* PR comments
* change access modifier to default package level
* minor changes to comments
* PR comments
Jonathan Wei
Clint Wylie
Roman Leventov
David Glasser
Jihoon Son
Gian Merlino
Vadim Ogievetsky
Furkan KAMACI
Justin Borromeo
Mirko Jotic
Himanshu Pandey
Mingming Qiu
Dylan Wylie
Fangyuan Deng
Surekha
scrawfor
awelsh93
Edward Gan