java.base/java.util.stringtokenizer.isdelimiter中的nullpoInterException

Question

有时我会在 java.base/java.util.stringtokenizer.isdelimiter 但是我不能一致地重现。

这是StackTrace：

java.base/java.util.StringTokenizer.isDelimiter(Unknown Source), 
java.base/java.util.StringTokenizer.scanToken(Unknown Source), 
java.base/java.util.StringTokenizer.countTokens(Unknown Source), 
com.sun.media.imageio.plugins.tiff.TIFFField.createFromMetadataNode(TIFFField.java:476), 
com.sun.media.imageioimpl.plugins.tiff.TIFFImageMetadata.parseIFD(TIFFImageMetadata.java:1576), 
com.sun.media.imageioimpl.plugins.tiff.TIFFImageMetadata.mergeNativeTree(TIFFImageMetadata.java:1600), 
com.sun.media.imageioimpl.plugins.tiff.TIFFImageMetadata.mergeTree(TIFFImageMetadata.java:1624), 
java.desktop/javax.imageio.metadata.IIOMetadata.setFromTree(Unknown Source)

我正在使用此行：

// metaData is of type: javax.imageio.metadata.IIOMetadata
// node is of type: org.w3c.dom.Node
// formatName has value: "com_sun_media_imageio_plugins_tiff_image_1.0";

metaData.setFromTree(formatName, node);

这可能是JVM中的错误吗？ 我正在使用pundion openjdk openj9 11.0.4