# Error deserializing data from data store Ignition 8.0.4

**URL:** <https://forum.inductiveautomation.com/t/error-deserializing-data-from-data-store-ignition-8-0-4/29386>\
**Category:** Ignition\
**Tags:** ignition80\
**Created:** [October 25, 2019, 9:02am UTC](https://forum.inductiveautomation.com/t/error-deserializing-data-from-data-store-ignition-8-0-4/29386 "2019-10-25T09:02:19Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![witman](https://avatars.discourse-cdn.com/v4/letter/w/d2c977/32.png) [@witman](https://forum.inductiveautomation.com/u/witman)\
**Post date:** [October 25, 2019, 9:02am UTC](https://forum.inductiveautomation.com/t/error-deserializing-data-from-data-store-ignition-8-0-4/29386/1 "2019-10-25T09:02:19Z")

</div>

I noticed an Ignition 8.0.4 historian server’s logs are getting spammed with the below error every few seconds.  
`StoreAndForward.Sink.HsqlDataStore Error deserializing data from data store.`  
Does the first line of the error details suggest an Ignition bug?

> **Error details**
>
> ```auto
> java.lang.ClassCastException: cannot assign instance of com.inductiveautomation.ignition.common.sqltags.model.types.DataQuality to field com.inductiveautomation.ignition.common.model.values.BasicQualifiedValue.quality of type com.inductiveautomation.ignition.common.model.values.QualityCode in instance of com.inductiveautomation.ignition.common.model.values.BasicQualifiedValue
> 
> at java.base/java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(Unknown Source)
> 
> at java.base/java.io.ObjectStreamClass$FieldReflector.checkObjectFieldValueTypes(Unknown Source)
> 
> at java.base/java.io.ObjectStreamClass.checkObjFieldValueTypes(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.defaultCheckFieldValues(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readSerialData(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readObject0(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.defaultReadFields(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readSerialData(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readObject0(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readObject(Unknown Source)
> 
> at java.base/java.util.ArrayList.readObject(Unknown Source)
> 
> at java.base/jdk.internal.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
> 
> at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> 
> at java.base/java.lang.reflect.Method.invoke(Unknown Source)
> 
> at java.base/java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readSerialData(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readObject0(Unknown Source)
> 
> at java.base/java.io.ObjectInputStream.readObject(Unknown Source)
> 
> at com.inductiveautomation.ignition.gateway.cluster.ClusterUtil.deserializeObject(ClusterUtil.java:96)
> 
> at com.inductiveautomation.ignition.gateway.cluster.ClusterUtil.deserializeObject(ClusterUtil.java:56)
> 
> at com.inductiveautomation.ignition.gateway.cluster.ClusterUtil.unzipAndDeserializeObject(ClusterUtil.java:90)
> 
> at com.inductiveautomation.ignition.gateway.history.stores.AbstractDatasourceStore.deserializeObject(AbstractDatasourceStore.java:490)
> 
> at com.inductiveautomation.ignition.gateway.history.stores.AbstractDatasourceStore.loadTransactions(AbstractDatasourceStore.java:563)
> 
> at com.inductiveautomation.ignition.gateway.history.stores.AbstractDatasourceStore.syncdTakeNext(AbstractDatasourceStore.java:506)
> 
> at com.inductiveautomation.ignition.gateway.history.stores.AbstractStore.takeNext(AbstractStore.java:208)
> 
> at com.inductiveautomation.ignition.gateway.history.stores.MultiStageStore.syncdTakeNext(MultiStageStore.java:165)
> 
> at com.inductiveautomation.ignition.gateway.history.stores.AbstractStore.takeNext(AbstractStore.java:208)
> 
> at com.inductiveautomation.ignition.gateway.history.forwarders.ForwarderThread.synchedTakeNext(ForwarderThread.java:204)
> 
> at com.inductiveautomation.ignition.gateway.history.forwarders.RedundancyAwareForwarder.synchedTakeNext(RedundancyAwareForwarder.java:68)
> 
> at com.inductiveautomation.ignition.gateway.history.forwarders.ForwarderThread.run(ForwarderThread.java:139)
> 
> ```

Store & Forward is all at 0% with nothing quarantined and the trends that rely on data from this server all seem to be working.

---

<div class="post-metadata">

**Author:** ![BrandonSHill](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/brandonshill/32/6805_2.png) [@BrandonSHill](https://forum.inductiveautomation.com/u/BrandonSHill)\
**Post date:** [January 8, 2020, 9:49pm UTC](https://forum.inductiveautomation.com/t/error-deserializing-data-from-data-store-ignition-8-0-4/29386/2 "2020-01-08T21:49:14Z")

</div>

I 2nd this. Any ideas?

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [January 8, 2020, 10:22pm UTC](https://forum.inductiveautomation.com/t/error-deserializing-data-from-data-store-ignition-8-0-4/29386/3 "2020-01-08T22:22:57Z")

</div>

Did you recently upgrade from 7.9.x to 8.0.x?

---

<div class="post-metadata">

**Author:** ![witman](https://avatars.discourse-cdn.com/v4/letter/w/d2c977/32.png) [@witman](https://forum.inductiveautomation.com/u/witman)\
**Post date:** [January 8, 2020, 10:57pm UTC](https://forum.inductiveautomation.com/t/error-deserializing-data-from-data-store-ignition-8-0-4/29386/4 "2020-01-08T22:57:36Z")

</div>

We upgraded to 8.0.5 November 4th and I just checked the logs and it doesn’t look like we’ve had any of these since then (through 8.0.6 & 8.0.7 upgrades as well).

@paul-griffith; in case it’s helpful: we upgraded from 7.9.10 to 8.0.2 June 6th and I noticed this in October after upgrading from 8.0.2 to 8.0.4 on October 10th.

---

<div class="post-metadata">

**Author:** ![BrandonSHill](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/brandonshill/32/6805_2.png) [@BrandonSHill](https://forum.inductiveautomation.com/u/BrandonSHill)\
**Post date:** [January 9, 2020, 1:48pm UTC](https://forum.inductiveautomation.com/t/error-deserializing-data-from-data-store-ignition-8-0-4/29386/5 "2020-01-09T13:48:31Z")

</div>

Fixed the error yesterday, thanks for reply though. Found a response from another thread finally, and turned off Data Cache, and renamed the folder. Yes we upgraded recently and the store and forward was having issues with old quarantined data.