GitHub user ahgittin opened a pull request:
https://github.com/apache/brooklyn-server/pull/306
don't hold lock on EntityManagementSupport for longer than needed
fixes a deadlock observed with a screwy blueprints, when:
"item added" callback: locking EntityManagementSupport to get subscription
context, while updating members
at
org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport.getSubscriptionContext(EntityManagementSupport.java:362)
- waiting to lock <0x0000000088908188> (a
org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport)
at
org.apache.brooklyn.core.entity.AbstractEntity$BasicSubscriptionSupport.getSubscriptionContext(AbstractEntity.java:1519)
at
org.apache.brooklyn.core.entity.AbstractEntity$BasicSensorSupport.emitInternal(AbstractEntity.java:1191)
at
org.apache.brooklyn.core.entity.AbstractEntity$BasicSensorSupport.emit(AbstractEntity.java:1184)
at
org.apache.brooklyn.core.entity.EntityDynamicType.addSensorIfAbsent(EntityDynamicType.java:204)
at
org.apache.brooklyn.core.entity.AbstractEntity$BasicSensorSupport.set(AbstractEntity.java:1093)
at
org.apache.brooklyn.entity.group.AbstractGroupImpl.addMember(AbstractGroupImpl.java:134)
- locked <0x0000000085f0fa30> (a java.util.LinkedHashSet)
at
org.apache.brooklyn.entity.group.DynamicGroupImpl.onEntityAdded(DynamicGroupImpl.java:126)
- locked <0x0000000085f0fb28> (a java.lang.Object)
at
org.apache.brooklyn.entity.group.DynamicGroupImpl$MyEntitySetChangeListener.onItemAdded(DynamicGroupImpl.java:154)
publishing on management started, locking members in order to deliver,
while handling onManagementStarted
at
org.apache.brooklyn.entity.group.AbstractGroupImpl.getMembers(AbstractGroupImpl.java:269)
- waiting to lock <0x0000000085f0fa30> (a java.util.LinkedHashSet)
at sun.reflect.GeneratedMethodAccessor108.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.brooklyn.core.objs.proxy.EntityProxyImpl.invoke(EntityProxyImpl.java:188)
at com.sun.proxy.$Proxy181.getMembers(Unknown Source)
at
org.apache.brooklyn.core.mgmt.internal.AbstractSubscriptionManager$2.apply(AbstractSubscriptionManager.java:130)
at
org.apache.brooklyn.core.mgmt.internal.AbstractSubscriptionManager$2.apply(AbstractSubscriptionManager.java:128)
at
org.apache.brooklyn.core.mgmt.internal.LocalSubscriptionManager.publish(LocalSubscriptionManager.java:221)
at
org.apache.brooklyn.core.mgmt.internal.QueueingSubscriptionManager.startDelegatingForPublishing(QueueingSubscriptionManager.java:91)
- locked <0x00000000889016a8> (a
org.apache.brooklyn.core.mgmt.internal.QueueingSubscriptionManager)
at
org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport.onManagementStarted(EntityManagementSupport.java:247)
- locked <0x0000000088908188> (a
org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport)
at
org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.manageRecursive(LocalEntityManager.java:392)
at
org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.manage(LocalEntityManager.java:278)
at
org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.createEntity(LocalEntityManager.java:152)
at
org.apache.brooklyn.core.mgmt.EntityManagementUtils.createUnstarted(EntityManagementUtils.java:83)
my blueprint had a static sensor waiting on an attribute from another
static sensor, which is possibly why...
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ahgittin/brooklyn-server
management-synchronization
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/brooklyn-server/pull/306.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #306
----
commit f0690255ed6a686f7cfad82f04ec4dc3ac22d7a2
Author: Alex Heneveld <[email protected]>
Date: 2016-08-24T12:52:22Z
don't hold lock on EntityManagementSupport for longer than needed
fixes a deadlock observed with a screwy blueprints, when:
"item added" callback: locking EntityManagementSupport to get subscription
context, while updating members
at
org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport.getSubscriptionContext(EntityManagementSupport.java:362)
- waiting to lock <0x0000000088908188> (a
org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport)
at
org.apache.brooklyn.core.entity.AbstractEntity$BasicSubscriptionSupport.getSubscriptionContext(AbstractEntity.java:1519)
at
org.apache.brooklyn.core.entity.AbstractEntity$BasicSensorSupport.emitInternal(AbstractEntity.java:1191)
at
org.apache.brooklyn.core.entity.AbstractEntity$BasicSensorSupport.emit(AbstractEntity.java:1184)
at
org.apache.brooklyn.core.entity.EntityDynamicType.addSensorIfAbsent(EntityDynamicType.java:204)
at
org.apache.brooklyn.core.entity.AbstractEntity$BasicSensorSupport.set(AbstractEntity.java:1093)
at
org.apache.brooklyn.entity.group.AbstractGroupImpl.addMember(AbstractGroupImpl.java:134)
- locked <0x0000000085f0fa30> (a java.util.LinkedHashSet)
at
org.apache.brooklyn.entity.group.DynamicGroupImpl.onEntityAdded(DynamicGroupImpl.java:126)
- locked <0x0000000085f0fb28> (a java.lang.Object)
at
org.apache.brooklyn.entity.group.DynamicGroupImpl$MyEntitySetChangeListener.onItemAdded(DynamicGroupImpl.java:154)
publishing on management started, locking members in order to deliver,
while handling onManagementStarted
at
org.apache.brooklyn.entity.group.AbstractGroupImpl.getMembers(AbstractGroupImpl.java:269)
- waiting to lock <0x0000000085f0fa30> (a java.util.LinkedHashSet)
at sun.reflect.GeneratedMethodAccessor108.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.brooklyn.core.objs.proxy.EntityProxyImpl.invoke(EntityProxyImpl.java:188)
at com.sun.proxy.$Proxy181.getMembers(Unknown Source)
at
org.apache.brooklyn.core.mgmt.internal.AbstractSubscriptionManager$2.apply(AbstractSubscriptionManager.java:130)
at
org.apache.brooklyn.core.mgmt.internal.AbstractSubscriptionManager$2.apply(AbstractSubscriptionManager.java:128)
at
org.apache.brooklyn.core.mgmt.internal.LocalSubscriptionManager.publish(LocalSubscriptionManager.java:221)
at
org.apache.brooklyn.core.mgmt.internal.QueueingSubscriptionManager.startDelegatingForPublishing(QueueingSubscriptionManager.java:91)
- locked <0x00000000889016a8> (a
org.apache.brooklyn.core.mgmt.internal.QueueingSubscriptionManager)
at
org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport.onManagementStarted(EntityManagementSupport.java:247)
- locked <0x0000000088908188> (a
org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport)
at
org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.manageRecursive(LocalEntityManager.java:392)
at
org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.manage(LocalEntityManager.java:278)
at
org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.createEntity(LocalEntityManager.java:152)
at
org.apache.brooklyn.core.mgmt.EntityManagementUtils.createUnstarted(EntityManagementUtils.java:83)
my blueprint had a static sensor waiting on an attribute from another
static sensor, which is possibly why...
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