ZhongYu created CASSANDRA-7664:
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Summary: IndexOutOfBoundsException thrown during repair
Key: CASSANDRA-7664
URL: https://issues.apache.org/jira/browse/CASSANDRA-7664
Project: Cassandra
Issue Type: Bug
Components: Core
Environment: RHEL 6.1
Casandra 1.2.18
Reporter: ZhongYu
I was running repair command with moderate read and write load at the same
time. And I found tens of IndexOutOfBoundsException in system log as follows:
ERROR [Thread-6056] 2013-05-22 14:47:59,416 CassandraDaemon.java (line132)
Exception in thread Thread[Thread-6056,5,main]
java.lang.IndexOutOfBoundsException
at sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:75)
at
org.apache.cassandra.streaming.compress.CompressedInputStream$Reader.runMayThrow(CompressedInputStream.java:151)
at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
at java.lang.Thread.run(Thread.java:662)
I read the source code of CompressedInputStream.java and found there surely
will throw IndexOutOfBoundsException in the following situation:
{code:title=Bar.java|borderStyle=solid}
// Part of CompressedInputStream.java start from Line 139
protected void runMayThrow() throws Exception
{
byte[] compressedWithCRC;
while (chunks.hasNext())
{
CompressionMetadata.Chunk chunk = chunks.next();
int readLength = chunk.length + 4; // read with CRC
compressedWithCRC = new byte[readLength];
int bufferRead = 0;
while (bufferRead < readLength)
bufferRead += source.read(compressedWithCRC, bufferRead,
readLength - bufferRead);
dataBuffer.put(compressedWithCRC);
}
}
{code}
If read function read nothing because the end of the stream has been reached,
it will return -1, thus bufferRead can be negetive. In the next turn read
function will throw IndexOutOfBoundsException because bufferRead is negetive.
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