将大量记录写入BigTable时出现以下错误。
java.lang.NullPointerException
at java.util.TreeMap.getEntry(TreeMap.java:347)
at java.util.TreeMap.get(TreeMap.java:278)
at com.google.cloud.bigtable.beam.AbstractCloudBigtableTableDoFn.logRetriesExhaustedWithDetailsException(AbstractCloudBigtableTableDoFn.java:58)
at com.google.cloud.bigtable.beam.AbstractCloudBigtableTableDoFn.logExceptions(AbstractCloudBigtableTableDoFn.java:107)
at com.google.cloud.bigtable.beam.CloudBigtableIO$BufferedMutatorDoFn$1.onException(CloudBigtableIO.java:840)
at com.google.cloud.bigtable.hbase.BigtableBufferedMutator.handleExceptions(BigtableBufferedMutator.java:146)
at com.google.cloud.bigtable.hbase.BigtableBufferedMutator.mutate(BigtableBufferedMutator.java:135)
at com.google.cloud.bigtable.beam.CloudBigtableIO$CloudBigtableSingleTableBufferedWriteFn.processElement(CloudBigtableIO.java:877)
我认为这与TreeMap类的实现有关。仅当我增加从GCS读取的记录数时，才会发生这种情况。 我该如何解决？