[英]java.io.StreamCorruptedException: unexpected end of block data - when communicating between defferent JVMs
[英]`java.io.StreamCorruptedException: unexpected end of block data` when reading certain objects from file
我有一些非常基本的序列化代碼:
void serializeObjectToFile(Serializable serializable, File file) {
ObjectOutputStream stream = null;
try {
stream = new ObjectOutputStream(new FileOutputStream(file));
stream.writeObject(serializable);
stream.flush();
} catch (Exception exception) {
logger.error("Failed to serialize object: {}.", serializable, exception);
} finally {
if (stream != null) {
try {
stream.close();
} catch (IOException exc) {
logger.error("Error closing stream.", exc);
}
}
}
}
還有一些非常反序列化的代碼:
Object deserializeObjectFromFile(File file) {
ObjectInputStream oiStream = null;
try {
oiStream = new ObjectInputStream(new FileInputStream(file));
return oiStream.readObject();
} catch (Exception exc) {
logger.error("Exception loading object from file '{}'.", file.getAbsolutePath(), exc);
} finally {
if (oiStream != null) {
try {
oiStream.close();
} catch (IOException exc) {
logger.error("Error closing stream.", exc);
}
}
}
return null;
}
此代碼適用於大多數對象。 但對於某些對象,我得到以下異常:
java.io.StreamCorruptedException: unexpected end of block data
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) ~[na:1.6.0_29]
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328) ~[na:1.6.0_29]
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350) ~[na:1.6.0_29]
at java.util.ArrayList.readObject(ArrayList.java:593) ~[na:1.6.0_29]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_29]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_29]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_29]
at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_29]
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328) ~[na:1.6.0_29]
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328) ~[na:1.6.0_29]
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350) ~[na:1.6.0_29]
at my.CustomClass.deserializeObjectFromFile(CustomClass.java:79) ~[classes/:na]
我不會嘗試為每個文件序列化多個對象(正如關於該主題的其他問題所建議的那樣)。 該代碼適用於大多數對象,但不適用於某些對象。 由於ArrayList.readObject()
出現在堆棧跟蹤中:是否與問題有關? 如果是這樣,什么? 令我驚訝和沮喪的是,我在網上沒有發現任何問題......
我很欣賞從這里開始的任何指示...!
我發現了問題:對象圖中深處的一個對象實現了以下方法:
private void writeObject(java.io.ObjectOutputStream out) throws IOException
沒有實際將其內部結構寫入ObjectOutputStream
並且沒有拋出異常(該方法是為了驗證目的而實現的)。 所以解決方案是:在實現此方法時,要么拋出某種Exception
,要么將對象的內部結構寫入ObjectOutputStream
。 最簡單的就是打電話
out.defaultWriteObject();
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