Google cloud dataflow DoFn中的com.google.cloud.dataflow.sdk.util.IllegalMutationException转换为org.apache.hadoop.hbase.client.Put

Google cloud dataflow DoFn中的com.google.cloud.dataflow.sdk.util.IllegalMutationException转换为org.apache.hadoop.hbase.client.Put,google-cloud-dataflow,google-cloud-bigtable,Google Cloud Dataflow,Google Cloud Bigtable,我正在尝试将对象转换为DoFn中的org.apache.hadoop.hbase.client.Put。 我不断地发现这个错误: com.google.cloud.dataflow.sdk.util.IllegalMutationException: DoFn DataBuckettingToBigTableConnectorFn mutated value {"totalColumns":36,"row":"HealthTechnology#MedicalSpecialties#1470010

我正在尝试将对象转换为DoFn中的org.apache.hadoop.hbase.client.Put。 我不断地发现这个错误:

com.google.cloud.dataflow.sdk.util.IllegalMutationException: DoFn DataBuckettingToBigTableConnectorFn mutated value {"totalColumns":36,"row":"HealthTechnology#MedicalSpecialties#1470010560000#gnip","families":{"SENT":[{"qualifier":"sector","vlen":16,"tag":[],"timestamp":1475153818546},{"qualifier":"industry","vlen":18,"tag":[],"timestamp":1475153818546},{"qualifier":"updateTime","vlen":8,"tag":[],"timestamp":1475153818546},{"qualifier":"timeBucket","vlen":8,"tag":[],"timestamp":1475153818546}]}} after it was output (new value was {"totalColumns":36,"row":"HealthTechnology#MedicalSpecialties#1470010560000#gnip","families":{"SENT":[{"qualifier":"sector","vlen":16,"tag":[],"timestamp":1475153818576},{"qualifier":"industry","vlen":18,"tag":[],"timestamp":1475153818576},{"qualifier":"updateTime","vlen":8,"tag":[],"timestamp":1475153818576},{"qualifier":"timeBucket","vlen":8,"tag":[],"timestamp":1475153818576}]}}). Values must not be mutated in any way after being output.
Caused by: com.google.cloud.dataflow.sdk.util.IllegalMutationException: Value {"totalColumns":36,"row":"HealthTechnology#MedicalSpecialties#1470010560000#gnip","families":{"SENT":[{"qualifier":"sector","vlen":16,"tag":[],"timestamp":1475153818546},{"qualifier":"industry","vlen":18,"tag":[],"timestamp":1475153818546},{"qualifier":"updateTime","vlen":8,"tag":[],"timestamp":1475153818546},{"qualifier":"timeBucket","vlen":8,"tag":[],"timestamp":1475153818546}]}} mutated illegally, new value was {"totalColumns":36,"row":"HealthTechnology#MedicalSpecialties#1470010560000#gnip","families":{"SENT":[{"qualifier":"sector","vlen":16,"tag":[],"timestamp":1475153818576},{"qualifier":"industry","vlen":18,"tag":[],"timestamp":1475153818576},{"qualifier":"updateTime","vlen":8,"tag":[],"timestamp":1475153818576},{"qualifier":"timeBucket","vlen":8,"tag":[],"timestamp":1475153818576}]}}. 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    at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.illegalMutation(MutationDetectors.java:167) ~[google-cloud-dataflow-java-sdk-all-1.7.0.jar:na]
    at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.verifyUnmodifiedThrowingCheckedExceptions(MutationDetectors.java:162) ~[google-cloud-dataflow-java-sdk-all-1.7.0.jar:na]
    at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.verifyUnmodified(MutationDetectors.java:113) ~[google-cloud-dataflow-java-sdk-all-1.7.0.jar:na]
    at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.verifyOutputUnmodified(ParDo.java:1338) ~[google-cloud-dataflow-java-sdk-all-1.7.0.jar:na]
    at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.output(ParDo.java:1306) ~[google-cloud-dataflow-java-sdk-all-1.7.0.jar:na]
    at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:287) ~[google-cloud-dataflow-java-sdk-all-1.7.0.jar:na]
    at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449) ~[google-cloud-dataflow-java-sdk-all-1.7.0.jar:na]
但是,如果使用不同于org.apache.hadoop.hbase.client.Put(任何自定义类型)的类,则不会发生错误

以下是当前的DoFn processElementMethod:

@Override
public void processElement(ProcessContext c) throws Exception {
        KV<Key, DataflowBucketedData> element = c.element();
        if(element == null)
            return;
        Key itemKey = element.getKey();
        DataflowBucketedData val = element.getValue();

        String key;
        switch (element.getKey().getKeyType()){
            case Industry:
                key = INDUSTRY_KEY_UTILS.createKey(itemKey.getSectorCode(), itemKey.getIndustryCode(), val.getTimeBucket().getTime(), val.getSource().name().toLowerCase());
                break;
            case Sector:
            key = SECTOR_KEY_UTILS.createKey(itemKey.getSectorCode(), val.getTimeBucket().getTime(), val.getSource().name().toLowerCase());
            break;
        case Symbol:
            key = SYMBOL_KEY_UTILS.createKey(itemKey.getSymbol(), val.getTimeBucket().getTime(), val.getSource().name().toLowerCase());
            break;
        default:
            key = null;
            break;
    }
    if(!Strings.isNullOrEmpty(key)) {
        Put p = createEntity(key, itemKey.getSymbol(), itemKey.getSectorCode(), itemKey.getIndustryCode(), val);
        c.output(p);
    }
}

private Put createEntity(String key, String company, String sectorCode, String industryCode, DataflowBucketedData data){
    Put put = new Put(Bytes.toBytes(key));
    put.setId(key);
    if(!Strings.isNullOrEmpty(company))
        put.addColumn(Schema.COLUMN_FAMILY, Schema.SYMBOL, Bytes.toBytes(company));
    else {
        put.addColumn(Schema.COLUMN_FAMILY, Schema.SECTOR, Bytes.toBytes(sectorCode));
        if(!Strings.isNullOrEmpty(industryCode))
            put.addColumn(Schema.COLUMN_FAMILY, Schema.INDUSTRY, Bytes.toBytes(industryCode));
    }
    if(data.getUpdateTime() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.UPDATE_TIME, Bytes.toBytes(data.getUpdateTime().getTime()));
    if (data.getTimeBucket() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.TIME_BUCKET, Bytes.toBytes(data.getTimeBucket().getTime()));

    if (data.getSource() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.SOURCE, Bytes.toBytes(data.getSource().name()));
    if (data.getMean() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.MEAN, Bytes.toBytes(data.getMean()));
    if (data.getMeanNegative() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.MEAN_NEGATIVE, Bytes.toBytes(data.getMeanNegative()));
    if (data.getMeanPositive() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.MEAN_POSITIVE, Bytes.toBytes(data.getMeanPositive()));
    if (data.getStandardDeviation() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.STANDARD_DEVIATION, Bytes.toBytes(data.getStandardDeviation()));
    if (data.getStandardDeviationNegative() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.STANDARD_DEVIATION_NEGATIVE, Bytes.toBytes(data.getStandardDeviationNegative()));
    if (data.getStandardDeviationPositive() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.STANDARD_DEVIATION_POSITIVE, Bytes.toBytes(data.getStandardDeviationPositive()));
    if (data.getVariance() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.VARIANCE, Bytes.toBytes(data.getVariance()));
    if (data.getVarianceNegative() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.VARIANCE_NEGATIVE, Bytes.toBytes(data.getVarianceNegative()));
    if (data.getVariancePositive() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.VARIANCE_POSITIVE, Bytes.toBytes(data.getVariancePositive()));
    if (data.getScoreFollowersWeighted() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE_FOLLOWERS_WEIGHTED, Bytes.toBytes(data.getScoreFollowersWeighted()));
    if (data.getScoreMaxScoreWeighted() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE_MAX_SCORE_WEIGHTED, Bytes.toBytes(data.getScoreMaxScoreWeighted()));
    if (data.getScoreSignFollowersWeighted() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE_SIGN_FOLLOWERS_WEIGHTED, Bytes.toBytes(data.getScoreSignFollowersWeighted()));
    if (data.getMaxScore() != null)
        put.addColumn(Schema.COLUMN_FAMILY, Schema.MAX_SCORE, Bytes.toBytes(data.getMaxScore()));

    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_OBSERVATIONS, Bytes.toBytes(data.getNumberOfObservations()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_OBSERVATIONS_NEGATIVE, Bytes.toBytes(data.getNumberOfObservationsNegative()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_OBSERVATIONS_POSITIVE, Bytes.toBytes(data.getNumberOfObservationsPositive()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_BULL_OBSERVATIONS, Bytes.toBytes(data.getNumberOfBullObservations()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_BULL_POSITIVE_OBSERVATIONS, Bytes.toBytes(data.getNumberOfBullPositiveObservations()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_BULL_NEGATIVE_OBSERVATIONS, Bytes.toBytes(data.getNumberOfBullNegativeObservations()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_BEAR_OBSERVATIONS, Bytes.toBytes(data.getNumberOfBearObservations()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_BEAR_POSITIVE_OBSERVATIONS, Bytes.toBytes(data.getNumberOfBearPositiveObservations()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.NUMBER_OF_BEAR_NEGATIVE_OBSERVATIONS, Bytes.toBytes(data.getNumberOfBearNegativeObservations()));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE, Bytes.toBytes(BigDecimal.valueOf(data.getScore())));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE_NEGATIVE, Bytes.toBytes(BigDecimal.valueOf(data.getScoreNegative())));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE_POSITIVE, Bytes.toBytes(BigDecimal.valueOf(data.getScorePositive())));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE_SQUARED, Bytes.toBytes(BigDecimal.valueOf(data.getScoreSquared())));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE_SQUARED_NEGATIVE, Bytes.toBytes(BigDecimal.valueOf(data.getScoreSquaredNegative())));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SCORE_SQUARED_POSITIVE, Bytes.toBytes(BigDecimal.valueOf(data.getScoreSquaredPositive())));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SUM_FOLLOWERS, Bytes.toBytes(BigDecimal.valueOf(data.getSumFollowers())));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SUM_SCORE_X_FOLLOWERS, Bytes.toBytes(BigDecimal.valueOf(data.getSumScoreXFollowers())));
    put.addColumn(Schema.COLUMN_FAMILY, Schema.SUM_SIGN_X_FOLLOWERS, Bytes.toBytes(BigDecimal.valueOf(data.getSumSignXFollowers())));
    return put;
}
有什么想法吗

更新: 我抓住了这个例子 它也不起作用,失效方式完全相同:

[main] INFO com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner - Executing pipeline using the DirectPipelineRunner.
Disconnected from the target VM, address: '127.0.0.1:50713', transport: 'socket'
Exception in thread "main" com.google.cloud.dataflow.sdk.Pipeline$PipelineExecutionException: com.google.cloud.dataflow.sdk.util.IllegalMutationException: DoFn  mutated value {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801718}]}} after it was output (new value was {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801752}]}}). Values must not be mutated in any way after being output.
    at com.google.cloud.dataflow.sdk.Pipeline.run(Pipeline.java:186)
    at com.google.cloud.bigtable.dataflow.example.HelloWorldWrite.main(HelloWorldWrite.java:113)
Caused by: com.google.cloud.dataflow.sdk.util.IllegalMutationException: DoFn  mutated value {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801718}]}} after it was output (new value was {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801752}]}}). Values must not be mutated in any way after being output.
    at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.verifyOutputUnmodified(ParDo.java:1344)
    at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.output(ParDo.java:1306)
    at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:287)
    at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449)
    at com.google.cloud.bigtable.dataflow.example.HelloWorldWrite$1.processElement(HelloWorldWrite.java:71)
Caused by: com.google.cloud.dataflow.sdk.util.IllegalMutationException: Value {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801718}]}} mutated illegally, new value was {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801752}]}}. Encoding was PRIFV29ybGQaNAoyCgJjZhIJcXVhbGlmaWVyGPC19OLitM8CIhh2YWx1ZV8xNC41NDc5NDY0NDY0NzMyNTY, now PRIFV29ybGQaNAoyCgJjZhIJcXVhbGlmaWVyGMC_9uLitM8CIhh2YWx1ZV8xNC41NDc5NDY0NDY0NzMyNTY.
    at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.illegalMutation(MutationDetectors.java:167)
    at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.verifyUnmodifiedThrowingCheckedExceptions(MutationDetectors.java:162)
    at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.verifyUnmodified(MutationDetectors.java:113)
    at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.verifyOutputUnmodified(ParDo.java:1338)
    at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.output(ParDo.java:1306)
    at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:287)
    at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449)
    at com.google.cloud.bigtable.dataflow.example.HelloWorldWrite$1.processElement(HelloWorldWrite.java:71)
    at com.google.cloud.dataflow.sdk.util.SimpleDoFnRunner.invokeProcessElement(SimpleDoFnRunner.java:49)
    at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.processElement(DoFnRunnerBase.java:138)
    at com.google.cloud.dataflow.sdk.transforms.ParDo.evaluateHelper(ParDo.java:1229)
    at com.google.cloud.dataflow.sdk.transforms.ParDo.evaluateSingleHelper(ParDo.java:1098)
    at com.google.cloud.dataflow.sdk.transforms.ParDo.access$300(ParDo.java:457)
    at com.google.cloud.dataflow.sdk.transforms.ParDo$1.evaluate(ParDo.java:1084)
    at com.google.cloud.dataflow.sdk.transforms.ParDo$1.evaluate(ParDo.java:1079)
    at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner$Evaluator.visitTransform(DirectPipelineRunner.java:858)
    at com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:219)
    at com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:215)
    at com.google.cloud.dataflow.sdk.runners.TransformHierarchy.visit(TransformHierarchy.java:102)
    at com.google.cloud.dataflow.sdk.Pipeline.traverseTopologically(Pipeline.java:259)
    at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner$Evaluator.run(DirectPipelineRunner.java:814)
    at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner.run(DirectPipelineRunner.java:526)
    at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner.run(DirectPipelineRunner.java:96)
    at com.google.cloud.dataflow.sdk.Pipeline.run(Pipeline.java:180)
    at com.google.cloud.bigtable.dataflow.example.HelloWorldWrite.main(HelloWorldWrite.java:113)

对你的麻烦感到抱歉。这是cloud Bigtable连接器中的一个bug。我们在即将发布的0.9.3版本中修复了这个问题

您有两个选项可以修复此问题:

  • 升级到0.9.3-SNAPSHOT。您将需要中的“存储库”部分。在正式发布0.9.3版本之前,我们正在等待另一个修复程序的确认。这有望在下周初实现
  • 使用0.9.2并在所有
    Put.addColumn()
    调用上设置时间戳参数(System.currentTimeMillis())

  • 对你的麻烦感到抱歉。这是cloud Bigtable连接器中的一个bug。我们在即将发布的0.9.3版本中修复了这个问题

    您有两个选项可以修复此问题:

  • 升级到0.9.3-SNAPSHOT。您将需要中的“存储库”部分。在正式发布0.9.3版本之前,我们正在等待另一个修复程序的确认。这有望在下周初实现
  • 使用0.9.2并在所有
    Put.addColumn()
    调用上设置时间戳参数(System.currentTimeMillis())

  • @sduskis,谢谢,0.9.3的预计到达时间是多少?可能下周初。我们正在运行额外的内部测试,并与有一些特定问题需要确认修复的客户交谈。@sduskis,感谢您提供的信息这在0.9.1中不是问题,因此您可以使用该版本作为替代。0.9.3已经过时。对不起,这是我的错delay@sduskis,谢谢,0.9.3的预计到达时间是多少?可能下周初。我们正在运行额外的内部测试,并与有一些特定问题需要确认修复的客户交谈。@sduskis,感谢您提供的信息这在0.9.1中不是问题,因此您可以使用该版本作为替代。0.9.3已经过时。抱歉耽搁了
    [main] INFO com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner - Executing pipeline using the DirectPipelineRunner.
    Disconnected from the target VM, address: '127.0.0.1:50713', transport: 'socket'
    Exception in thread "main" com.google.cloud.dataflow.sdk.Pipeline$PipelineExecutionException: com.google.cloud.dataflow.sdk.util.IllegalMutationException: DoFn  mutated value {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801718}]}} after it was output (new value was {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801752}]}}). Values must not be mutated in any way after being output.
        at com.google.cloud.dataflow.sdk.Pipeline.run(Pipeline.java:186)
        at com.google.cloud.bigtable.dataflow.example.HelloWorldWrite.main(HelloWorldWrite.java:113)
    Caused by: com.google.cloud.dataflow.sdk.util.IllegalMutationException: DoFn  mutated value {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801718}]}} after it was output (new value was {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801752}]}}). Values must not be mutated in any way after being output.
        at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.verifyOutputUnmodified(ParDo.java:1344)
        at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.output(ParDo.java:1306)
        at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:287)
        at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449)
        at com.google.cloud.bigtable.dataflow.example.HelloWorldWrite$1.processElement(HelloWorldWrite.java:71)
    Caused by: com.google.cloud.dataflow.sdk.util.IllegalMutationException: Value {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801718}]}} mutated illegally, new value was {"totalColumns":1,"row":"World","families":{"cf":[{"qualifier":"qualifier","vlen":24,"tag":[],"timestamp":1475158801752}]}}. Encoding was PRIFV29ybGQaNAoyCgJjZhIJcXVhbGlmaWVyGPC19OLitM8CIhh2YWx1ZV8xNC41NDc5NDY0NDY0NzMyNTY, now PRIFV29ybGQaNAoyCgJjZhIJcXVhbGlmaWVyGMC_9uLitM8CIhh2YWx1ZV8xNC41NDc5NDY0NDY0NzMyNTY.
        at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.illegalMutation(MutationDetectors.java:167)
        at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.verifyUnmodifiedThrowingCheckedExceptions(MutationDetectors.java:162)
        at com.google.cloud.dataflow.sdk.util.MutationDetectors$CodedValueMutationDetector.verifyUnmodified(MutationDetectors.java:113)
        at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.verifyOutputUnmodified(ParDo.java:1338)
        at com.google.cloud.dataflow.sdk.transforms.ParDo$ImmutabilityCheckingOutputManager.output(ParDo.java:1306)
        at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:287)
        at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449)
        at com.google.cloud.bigtable.dataflow.example.HelloWorldWrite$1.processElement(HelloWorldWrite.java:71)
        at com.google.cloud.dataflow.sdk.util.SimpleDoFnRunner.invokeProcessElement(SimpleDoFnRunner.java:49)
        at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.processElement(DoFnRunnerBase.java:138)
        at com.google.cloud.dataflow.sdk.transforms.ParDo.evaluateHelper(ParDo.java:1229)
        at com.google.cloud.dataflow.sdk.transforms.ParDo.evaluateSingleHelper(ParDo.java:1098)
        at com.google.cloud.dataflow.sdk.transforms.ParDo.access$300(ParDo.java:457)
        at com.google.cloud.dataflow.sdk.transforms.ParDo$1.evaluate(ParDo.java:1084)
        at com.google.cloud.dataflow.sdk.transforms.ParDo$1.evaluate(ParDo.java:1079)
        at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner$Evaluator.visitTransform(DirectPipelineRunner.java:858)
        at com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:219)
        at com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:215)
        at com.google.cloud.dataflow.sdk.runners.TransformHierarchy.visit(TransformHierarchy.java:102)
        at com.google.cloud.dataflow.sdk.Pipeline.traverseTopologically(Pipeline.java:259)
        at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner$Evaluator.run(DirectPipelineRunner.java:814)
        at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner.run(DirectPipelineRunner.java:526)
        at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner.run(DirectPipelineRunner.java:96)
        at com.google.cloud.dataflow.sdk.Pipeline.run(Pipeline.java:180)
        at com.google.cloud.bigtable.dataflow.example.HelloWorldWrite.main(HelloWorldWrite.java:113)