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https://issues.jboss.org/browse/ISPN-4125?page=com.atlassian.jira.plugin....
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Adrian Nistor edited comment on ISPN-4125 at 3/26/14 8:10 AM:
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It finally turns out I can reproduce this only on mysql. Strangely, it works fine with H2,
which is used in the test suite.
The root cause is DefaultTwoWayKey2StringMapper using an unsafe way of encoding a byte[]
into a String. It uses a special unicode character (0xFEFF) as prefix for all strings
which were mapped and need unmapping when fetched later. Unicode character 0xFEFF is a
silent character used for detecting the byte order of the string. Using it for our purpose
seems like a neat trick. Unfortunately when the database actually sees this string it is
free to interpret the byte ordering instruction and convert the string to native byte
order and then discard the marker as no longer necessary. This leaves us with no clue the
string was 'marked' by us. Mysql is such a database, while H2 seems to not
interfere here.
After isolating this problem to DefaultTwoWayKey2StringMapper I propose to close this
issue and open a new one.
was (Author: anistor):
It finally turns out I can reproduce this only on mysql. Strangely, it works fine with
H2, which is used in the test suite.
ClassCastException if cache.keyset() is invoked for a
string-keyed-jdbc-store in C/S mode
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Key: ISPN-4125
URL:
https://issues.jboss.org/browse/ISPN-4125
Project: Infinispan
Issue Type: Bug
Components: Remote Querying
Affects Versions: 6.0.0.Final
Reporter: Wolf-Dieter Fink
Assignee: Adrian Nistor
Labels: 621, 630
Fix For: 7.0.0.Alpha2, 7.0.0.Final
Attachments: reproducer.zip
If the cache is empty cache.keyset() invocation returns an empty set.
If it is invoked after entities are added it failes with the Exception below.
The same test work if a binary-keyed-jdbc-store is used!
The HotRod client is based on the hot-rod C/S quickstart.
The configuration is:
<subsystem xmlns="urn:infinispan:server:core:6.0"
default-cache-container="clustered">
<cache-container name="clustered"
default-cache="string" statistics="true">
<transport executor="infinispan-transport"
lock-timeout="60000"/>
<replicated-cache name="string" mode="ASYNC"
start="EAGER">
<locking isolation="READ_COMMITTED"
acquire-timeout="20000" concurrency-level="500"
striping="false"/>
<transaction mode="NONE"/>
<string-keyed-jdbc-store
datasource="java:jboss/datasources/JDGDatasource" passivation="false"
preload="true" purge="false" shared="false">
<!-- property
name="databaseType">ORACLE</property -->
<string-keyed-table prefix="qs">
<id-column name="id"
type="VARCHAR(255)"/>
<data-column name="datum"
type="BLOB(2000)"/>
<timestamp-column name="version"
type="BIGINT"/>
</string-keyed-table>
<write-behind modification-queue-size="1024"
shutdown-timeout="25000" flush-lock-timeout="15000"
thread-pool-size="5" />
</string-keyed-jdbc-store>
<expiration interval="10000" />
</replicated-cache>
ERROR [org.infinispan.server.hotrod.HotRodDecoder:76] (HotRodServerWorker-88) ISPN005009:
Unexpected error before any request parameters read: java.lang.ClassCastException:
java.lang.String cannot be cast to [B
at
org.infinispan.server.hotrod.AbstractEncoder1x$$anonfun$writeResponse$5.apply(AbstractEncoder1x.scala:113)
[infinispan.jar:7.0.0-SNAPSHOT]
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at
org.infinispan.server.hotrod.AbstractEncoder1x.writeResponse(AbstractEncoder1x.scala:113)
[infinispan.jar:7.0.0-SNAPSHOT]
at org.infinispan.server.hotrod.HotRodEncoder.encode(HotRodEncoder.scala:48)
[infinispan.jar:7.0.0-SNAPSHOT]
at
org.jboss.netty.handler.codec.oneone.OneToOneEncoder.doEncode(OneToOneEncoder.java:66)
[netty-3.6.6.Final.jar:]
at
org.jboss.netty.handler.codec.oneone.OneToOneEncoder.handleDownstream(OneToOneEncoder.java:59)
[netty-3.6.6.Final.jar:]
at org.jboss.netty.channel.Channels.write(Channels.java:704) [netty-3.6.6.Final.jar:]
at org.jboss.netty.channel.Channels.write(Channels.java:671) [netty-3.6.6.Final.jar:]
at org.jboss.netty.channel.AbstractChannel.write(AbstractChannel.java:248)
[netty-3.6.6.Final.jar:]
at
org.infinispan.server.core.AbstractProtocolDecoder.writeResponse(AbstractProtocolDecoder.scala:163)
[infinispan.jar:7.0.0-SNAPSHOT]
at org.infinispan.server.hotrod.HotRodDecoder.customDecodeKey(HotRodDecoder.scala:138)
[infinispan.jar:7.0.0-SNAPSHOT]
at
org.infinispan.server.core.AbstractProtocolDecoder.decodeKey(AbstractProtocolDecoder.scala:105)
[infinispan.jar:7.0.0-SNAPSHOT]
at
org.infinispan.server.core.AbstractProtocolDecoder.decode(AbstractProtocolDecoder.scala:53)
[infinispan.jar:7.0.0-SNAPSHOT]
at
org.infinispan.server.core.AbstractProtocolDecoder.decode(AbstractProtocolDecoder.scala:29)
[infinispan.jar:7.0.0-SNAPSHOT]
at
org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:500)
[netty-3.6.6.Final.jar:]
at
org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:435)
[netty-3.6.6.Final.jar:]
at
org.infinispan.server.core.AbstractProtocolDecoder.messageReceived(AbstractProtocolDecoder.scala:377)
[infinispan.jar:7.0.0-SNAPSHOT]
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
[netty-3.6.6.Final.jar:]
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
[netty-3.6.6.Final.jar:]
at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
[netty-3.6.6.Final.jar:]
at
org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:109)
[netty-3.6.6.Final.jar:]
at
org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
[netty-3.6.6.Final.jar:]
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:90)
[netty-3.6.6.Final.jar:]
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
[netty-3.6.6.Final.jar:]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
[rt.jar:1.7.0_51]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[rt.jar:1.7.0_51]
at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_51]
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