[jira] [Updated] (SOLR-7869) Overseer does not handle BadVersionException correctly
[
https://issues.apache.org/jira/browse/SOLR-7869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shalin Shekhar Mangar updated SOLR-7869:
Attachment: SOLR-7869.patch
Here's a better fix which discards ZkStateWriter on a BadVersionException and
starts afresh. The previous approach didn't work when an external change was
made on state.json with no changes to /clusterstate.json. Although such changes
can be detected and resolved inside ZkStateWriter but that would make this
class unnecessarily complex.
ZkStateWriter will put itself into an invalid state upon a BadVersionException
and will disallow all future operations. Callers are expected to discard such
an instance and create a fresh ZkStateWriter instance for future use.
I added two tests in ZkStateWriterTest which simulate an external change to
/clusterstate.json and a state.json and asserts that an IllegalStateException
is thrown on any future invocation of enqueueUpdate or writePendingUpdates.
I also added a test in Overseer which asserts that the overseer can keep
processing events on a BadVersionException (indirectly testing that a fresh
ZkStateWriter is created upon said exception).
I also added copious amounts of javadocs to the ZkStateWriter class for future
reference.
Overseer does not handle BadVersionException correctly
--
Key: SOLR-7869
URL: https://issues.apache.org/jira/browse/SOLR-7869
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 5.2.1
Reporter: Shalin Shekhar Mangar
Assignee: Shalin Shekhar Mangar
Labels: difficulty-medium, impact-low
Fix For: Trunk, 5.4
Attachments: SOLR-7869.patch, SOLR-7869.patch, SOLR-7869.patch
If the /clusterstate.json is modified externally then the Overseer can go
into an infinite loop upon a BadVersionException alternately trying to
execute main queue and then the work queue:
{code}
ERROR - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
work queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:286)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:168)
at java.lang.Thread.run(Thread.java:745)
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; processMessage:
queueSize: 1, message = {
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1} current state version: 9
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; Update state numShards=null
message={
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1}
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; shard=shard1 is already
registered
ERROR - 2015-08-04 18:49:56.225; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
main queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
[jira] [Updated] (SOLR-7869) Overseer does not handle BadVersionException correctly
[
https://issues.apache.org/jira/browse/SOLR-7869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shalin Shekhar Mangar updated SOLR-7869:
Attachment: SOLR-7869.patch
Thanks for the review Scott!
Both of your comments are now incorporated into this patch. I'll run precommit
and tests and commit once they succeed.
Overseer does not handle BadVersionException correctly
--
Key: SOLR-7869
URL: https://issues.apache.org/jira/browse/SOLR-7869
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 5.2.1
Reporter: Shalin Shekhar Mangar
Assignee: Shalin Shekhar Mangar
Labels: difficulty-medium, impact-low
Fix For: Trunk, 5.4
Attachments: SOLR-7869.patch, SOLR-7869.patch, SOLR-7869.patch,
SOLR-7869.patch
If the /clusterstate.json is modified externally then the Overseer can go
into an infinite loop upon a BadVersionException alternately trying to
execute main queue and then the work queue:
{code}
ERROR - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
work queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:286)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:168)
at java.lang.Thread.run(Thread.java:745)
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; processMessage:
queueSize: 1, message = {
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1} current state version: 9
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; Update state numShards=null
message={
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1}
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; shard=shard1 is already
registered
ERROR - 2015-08-04 18:49:56.225; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
main queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:286)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:213)
at java.lang.Thread.run(Thread.java:745)
INFO - 2015-08-04 18:49:56.225; [ ]
org.apache.solr.common.cloud.ZkStateReader; Updating data for gettingstarted
to ver 8
{code}
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[jira] [Updated] (SOLR-7869) Overseer does not handle BadVersionException correctly
[
https://issues.apache.org/jira/browse/SOLR-7869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shalin Shekhar Mangar updated SOLR-7869:
Fix Version/s: (was: 5.3)
5.4
Overseer does not handle BadVersionException correctly
--
Key: SOLR-7869
URL: https://issues.apache.org/jira/browse/SOLR-7869
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 5.2.1
Reporter: Shalin Shekhar Mangar
Assignee: Shalin Shekhar Mangar
Labels: difficulty-medium, impact-low
Fix For: Trunk, 5.4
Attachments: SOLR-7869.patch
If the /clusterstate.json is modified externally then the Overseer can go
into an infinite loop upon a BadVersionException alternately trying to
execute main queue and then the work queue:
{code}
ERROR - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
work queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:286)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:168)
at java.lang.Thread.run(Thread.java:745)
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; processMessage:
queueSize: 1, message = {
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1} current state version: 9
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; Update state numShards=null
message={
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1}
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; shard=shard1 is already
registered
ERROR - 2015-08-04 18:49:56.225; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
main queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:286)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:213)
at java.lang.Thread.run(Thread.java:745)
INFO - 2015-08-04 18:49:56.225; [ ]
org.apache.solr.common.cloud.ZkStateReader; Updating data for gettingstarted
to ver 8
{code}
--
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[jira] [Updated] (SOLR-7869) Overseer does not handle BadVersionException correctly
[
https://issues.apache.org/jira/browse/SOLR-7869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shalin Shekhar Mangar updated SOLR-7869:
Attachment: SOLR-7869.patch
Test + fix. I tried to reproduce this in the OverseerTest but it was proving to
be too difficult. The randomized test I had would maybe reproduce once in 5
times so I went back to the test Scott had written and augmented it.
# I wonder if it is better to assert that given cluster state version is
greater than ZkStateWriter's internal cluster state instead of blindly using
given cluster state when version is not equal.
# I also wonder if a better fix is to re-create ZkStateWriter object entirely
if refreshClusterState is true in the Overseer? The reason is what if a user
modifies a collection's state.json directly but doesn't modify the
/clusterstate.json. In that case, our current fix won't work.
Overseer does not handle BadVersionException correctly
--
Key: SOLR-7869
URL: https://issues.apache.org/jira/browse/SOLR-7869
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 5.2.1
Reporter: Shalin Shekhar Mangar
Assignee: Shalin Shekhar Mangar
Labels: difficulty-medium, impact-low
Fix For: Trunk, 5.4
Attachments: SOLR-7869.patch, SOLR-7869.patch
If the /clusterstate.json is modified externally then the Overseer can go
into an infinite loop upon a BadVersionException alternately trying to
execute main queue and then the work queue:
{code}
ERROR - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
work queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:286)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:168)
at java.lang.Thread.run(Thread.java:745)
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; processMessage:
queueSize: 1, message = {
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1} current state version: 9
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; Update state numShards=null
message={
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1}
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; shard=shard1 is already
registered
ERROR - 2015-08-04 18:49:56.225; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
main queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
[jira] [Updated] (SOLR-7869) Overseer does not handle BadVersionException correctly
[
https://issues.apache.org/jira/browse/SOLR-7869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Scott Blum updated SOLR-7869:
-
Attachment: SOLR-7869.patch
Attached a TEST ONLY that repros the failure. This is not a fix.
Overseer does not handle BadVersionException correctly
--
Key: SOLR-7869
URL: https://issues.apache.org/jira/browse/SOLR-7869
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 5.2.1
Reporter: Shalin Shekhar Mangar
Assignee: Shalin Shekhar Mangar
Labels: difficulty-medium, impact-low
Fix For: 5.3, Trunk
Attachments: SOLR-7869.patch
If the /clusterstate.json is modified externally then the Overseer can go
into an infinite loop upon a BadVersionException alternately trying to
execute main queue and then the work queue:
{code}
ERROR - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
work queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:286)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:168)
at java.lang.Thread.run(Thread.java:745)
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; processMessage:
queueSize: 1, message = {
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1} current state version: 9
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; Update state numShards=null
message={
operation:state,
state:down,
base_url:http://127.0.1.1:7574/solr;,
core:test_shard1_replica1,
roles:null,
node_name:127.0.1.1:7574_solr,
shard:null,
collection:test,
core_node_name:core_node1}
INFO - 2015-08-04 18:49:56.224; [ ]
org.apache.solr.cloud.overseer.ReplicaMutator; shard=shard1 is already
registered
ERROR - 2015-08-04 18:49:56.225; [ ]
org.apache.solr.cloud.Overseer$ClusterStateUpdater; Exception in Overseer
main queue loop
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /clusterstate.json
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:362)
at
org.apache.solr.common.cloud.SolrZkClient$8.execute(SolrZkClient.java:359)
at
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
at
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:359)
at
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:180)
at
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:67)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:286)
at
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:213)
at java.lang.Thread.run(Thread.java:745)
INFO - 2015-08-04 18:49:56.225; [ ]
org.apache.solr.common.cloud.ZkStateReader; Updating data for gettingstarted
to ver 8
{code}
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