cloventt edited a comment on issue #9820:
URL: https://github.com/apache/druid/issues/9820#issuecomment-687969450
We see this same issue using `index` tasks that are appending to an existing
interval, on indexers with Druid 0.18.1.
```java
2020-09-07 01:16:43,897 ERROR
[[index_ssp-hour_jjejaoee_2020-09-07T01:16:43.738Z]-threading-task-runner-executor-4]
logger.Logger (Logger.java:226) - Encountered exception in BUILD_SEGMENTS.
java.lang.NullPointerException: taskLockHelper is not initialized yet
at
com.google.common.base.Preconditions.checkNotNull(Preconditions.java:229)
~[guava-16.0.1.jar:?]
at
org.apache.druid.indexing.common.task.AbstractBatchIndexTask.getTaskLockHelper(AbstractBatchIndexTask.java:184)
~[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.IndexTask.generateAndPublishSegments(IndexTask.java:905)
~[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.IndexTask.runTask(IndexTask.java:526)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.AbstractBatchIndexTask.run(AbstractBatchIndexTask.java:123)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.overlord.ThreadingTaskRunner$1.call(ThreadingTaskRunner.java:209)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.overlord.ThreadingTaskRunner$1.call(ThreadingTaskRunner.java:149)
[druid-indexing-service-0.18.1.jar:0.18.1]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[?:1.8.0_265]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_265]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_265]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_265]
```
Our ingestion spec:
```json
{
"type": "index",
"spec": {
"dataSchema": {
"dataSource": "datasource",
"parser": {
"type": "string",
"parseSpec": {
"format": "json",
"timestampSpec": {
"column": "timestamp",
"format": "iso"
},
"dimensionsSpec": {
"dimensions": ["redacted" ]
}
}
},
"metricsSpec": ["redacted"],
"granularitySpec": {
"type": "uniform",
"segmentGranularity": "hour",
"queryGranularity": "hour",
"rollup": true,
"intervals": [
"2020-09-07T00:00Z/2020-09-07T01:00Z"
]
}
},
"tuningConfig": {
"type": "index",
"maxRowsPerSegment": 5000000,
"maxRowsInMemory": 100000
},
"ioConfig": {
"type": "index",
"appendToExisting": true,
"firehose": {
"type": "static-s3",
"fetchTimeout": 180000,
"maxFetchRetry": 5,
"prefixes": [
"s3://path-to-files"
]
}
}
},
"context": {
"forceTimeChunkLock": false
}
}
```
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