Hi,
I actually reproduced the issue with a small test. This shows the following
exception occurring after create and drop of a database after approx. 138
times. It either throws an exception directly or it hangs at 100% CPU first
for a while.
Heap dump file created [703409076 bytes in 4,691 secs]
java.lang.OutOfMemoryError: GC overhead limit exceeded
at java.util.jar.Attributes.read(Attributes.java:394)
at java.util.jar.Manifest.read(Manifest.java:199)
at java.util.jar.Manifest.<init>(Manifest.java:69)
at java.util.jar.JarFile.getManifestFromReference(JarFile.java:199)
at java.util.jar.JarFile.getManifest(JarFile.java:180)
at sun.misc.URLClassPath$JarLoader$2.getManifest(URLClassPath.java:
780)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:422)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at com.orientechnologies.orient.core.serialization.OMemoryStream.<
clinit>(OMemoryStream.java:51)
at com.orientechnologies.orient.server.network.protocol.binary.
ONetworkProtocolBinary.serializeExceptionObject(ONetworkProtocolBinary.java:
1623)
at com.orientechnologies.orient.server.network.protocol.binary.
ONetworkProtocolBinary.sendError(ONetworkProtocolBinary.java:657)
at com.orientechnologies.orient.server.network.protocol.binary.
OBinaryNetworkProtocolAbstract.sendErrorOrDropConnection(
OBinaryNetworkProtocolAbstract.java:238)
at com.orientechnologies.orient.server.network.protocol.binary.
OBinaryNetworkProtocolAbstract.execute(OBinaryNetworkProtocolAbstract.java:
218)
at com.orientechnologies.common.thread.OSoftThread.run(OSoftThread.
java:65)
This is the test code:
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import com.orientechnologies.orient.client.remote.OServerAdmin;
public class Test {
public static void main(String args[]) throws IOException,
InterruptedException {
for (int i = 0; i < 1000; i ++) {
String dbName = "oom_" + i;
OServerAdmin admin = new OServerAdmin("remote:localhost").connect(
"root","root");
admin.createDatabase(dbName, "graph", "plocal");
admin.close();
System.out.println("created " + dbName);
admin = new OServerAdmin("remote:localhost/" + dbName).connect("root"
,"root");
admin.dropDatabase("plocal");
admin.close();
System.out.println("dropped " + dbName);
TimeUnit.MILLISECONDS.sleep(2000); // the sleep actually does not
make a difference
}
}
}
I'll create an issue for this.
Xander
On Monday, December 1, 2014 8:02:51 AM UTC+1, Andrey Lomakin wrote:
>
> Hi,
>
> Could you send us hprof, it is really interesting.
> What is your db size ? What settings do you use ?
>
> Do you have 3 billions instances of disk cache ???
> What is your pattern of db usage ? It seems like you create storage for
> each operation, what is your typical test which throws OOM.
> Could we see it ?
>
>
>
> On Fri, Nov 28, 2014 at 5:10 PM, Xander Uiterlinden <
> [email protected] <javascript:>> wrote:
>
>> Hi,
>>
>> We've been using OrientDB2.0 M3 in testing a couple of days now. When
>> using M2 it was running out of memory every other day but since we we're
>> not using connection pooling at that time I thought that could be the
>> reason. Now we've enabled connection pooling and upgraded to M3 it still
>> happens.
>>
>> See below a screenshot of the objects after reading the hprof file into
>> YourKit. Maybe it rings a bell ? I could send the hprof if you're
>> interested.
>>
>>
>> <https://lh6.googleusercontent.com/-0hcMx4TkOWo/VHiPi1diiJI/AAAAAAAAA2g/PQvEAyJhbak/s1600/Schermafbeelding%2B2014-11-28%2Bom%2B16.02.39.png>
>> Thanks,
>>
>> Xander
>>
>> --
>>
>> ---
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>
>
>
> --
> Best regards,
> Andrey Lomakin.
>
>
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