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new 1edb3e8 CLOUDSTACK-9595: Avoiding the deadlocks in the code (#1762)
1edb3e8 is described below
commit 1edb3e8a450079e9f027f159ee7b8fa31e39b591
Author: subhash yedugundla <venkata.yedugun...@accelerite.com>
AuthorDate: Tue Dec 19 00:06:21 2017 +0530
CLOUDSTACK-9595: Avoiding the deadlocks in the code (#1762)
MySQLTransactionRollbackException is seen frequently in logs
Root Cause
Attempts to lock rows in the core data access layer of database fails if
there is a possibility of deadlock. However Operations are not getting retried
in case of deadlock. So introducing retries here
Solution
Operations would be retried after some wait time in case of dead lock
exception.
---
.../schema/src/com/cloud/host/dao/HostDaoImpl.java | 2 +-
.../com/cloud/network/IpAddressManagerImpl.java | 127 +++++++++++----------
2 files changed, 66 insertions(+), 63 deletions(-)
diff --git a/engine/schema/src/com/cloud/host/dao/HostDaoImpl.java
b/engine/schema/src/com/cloud/host/dao/HostDaoImpl.java
index 6f5d394..3335229 100644
--- a/engine/schema/src/com/cloud/host/dao/HostDaoImpl.java
+++ b/engine/schema/src/com/cloud/host/dao/HostDaoImpl.java
@@ -553,7 +553,6 @@ public class HostDaoImpl extends GenericDaoBase<HostVO,
Long> implements HostDao
public List<HostVO> findAndUpdateDirectAgentToLoad(long
lastPingSecondsAfter, Long limit, long managementServerId) {
TransactionLegacy txn = TransactionLegacy.currentTxn();
- txn.start();
if (s_logger.isDebugEnabled()) {
s_logger.debug("Resetting hosts suitable for reconnect");
}
@@ -569,6 +568,7 @@ public class HostDaoImpl extends GenericDaoBase<HostVO,
Long> implements HostDao
s_logger.debug("Acquiring hosts for clusters already owned by this
management server");
}
List<Long> clusters =
findClustersOwnedByManagementServer(managementServerId);
+ txn.start();
if (clusters.size() > 0) {
// handle clusters already owned by @managementServerId
SearchCriteria<HostVO> sc = UnmanagedDirectConnectSearch.create();
diff --git a/server/src/com/cloud/network/IpAddressManagerImpl.java
b/server/src/com/cloud/network/IpAddressManagerImpl.java
index e34f908..7961d07 100644
--- a/server/src/com/cloud/network/IpAddressManagerImpl.java
+++ b/server/src/com/cloud/network/IpAddressManagerImpl.java
@@ -291,6 +291,8 @@ public class IpAddressManagerImpl extends ManagerBase
implements IpAddressManage
SearchBuilder<IPAddressVO> AssignIpAddressSearch;
SearchBuilder<IPAddressVO> AssignIpAddressFromPodVlanSearch;
+ private final Object _allocatedLock = new Object();
+ private final Object _allocatingLock = new Object();
static Boolean rulesContinueOnErrFlag = true;
@@ -759,7 +761,7 @@ public class IpAddressManagerImpl extends ManagerBase
implements IpAddressManage
Filter filter = new Filter(IPAddressVO.class, "vlanId", true,
0l, 1l);
- List<IPAddressVO> addrs = _ipAddressDao.lockRows(sc, filter,
true);
+ List<IPAddressVO> addrs = _ipAddressDao.search(sc, filter,
false);
// If all the dedicated IPs of the owner are in use fetch an
IP from the system pool
if (addrs.size() == 0 && fetchFromDedicatedRange) {
@@ -769,7 +771,7 @@ public class IpAddressManagerImpl extends ManagerBase
implements IpAddressManage
fetchFromDedicatedRange = false;
sc.setParameters("vlanId",
nonDedicatedVlanDbIds.toArray());
errorMessage.append(", vlanId id=" +
Arrays.toString(nonDedicatedVlanDbIds.toArray()));
- addrs = _ipAddressDao.lockRows(sc, filter, true);
+ addrs = _ipAddressDao.search(sc, filter, false);
}
}
@@ -804,24 +806,21 @@ public class IpAddressManagerImpl extends ManagerBase
implements IpAddressManage
addr.setAllocatedInDomainId(owner.getDomainId());
addr.setAllocatedToAccountId(owner.getId());
addr.setSystem(isSystem);
+
if (displayIp != null) {
addr.setDisplay(displayIp);
}
- if (assign) {
- markPublicIpAsAllocated(addr);
- } else {
- addr.setState(IpAddress.State.Allocating);
- }
- addr.setState(assign ? IpAddress.State.Allocated :
IpAddress.State.Allocating);
-
if (vlanUse != VlanType.DirectAttached) {
addr.setAssociatedWithNetworkId(guestNetworkId);
addr.setVpcId(vpcId);
}
- _ipAddressDao.update(addr.getId(), addr);
-
+ if (assign) {
+ markPublicIpAsAllocated(addr);
+ } else {
+ markPublicIpAsAllocating(addr);
+ }
return addr;
}
});
@@ -836,35 +835,51 @@ public class IpAddressManagerImpl extends ManagerBase
implements IpAddressManage
@DB
@Override
public void markPublicIpAsAllocated(final IPAddressVO addr) {
-
- Transaction.execute(new TransactionCallbackNoReturn() {
- @Override
- public void doInTransactionWithoutResult(TransactionStatus status)
{
- Account owner =
_accountMgr.getAccount(addr.getAllocatedToAccountId());
- synchronized (this) {
+ synchronized (_allocatedLock) {
+ Transaction.execute(new TransactionCallbackNoReturn() {
+ @Override
+ public void doInTransactionWithoutResult(TransactionStatus
status) {
+ Account owner =
_accountMgr.getAccount(addr.getAllocatedToAccountId());
if (_ipAddressDao.lockRow(addr.getId(), true) != null) {
IPAddressVO userIp =
_ipAddressDao.findById(addr.getId());
if (userIp.getState() == IpAddress.State.Allocating ||
addr.getState() == IpAddress.State.Free) {
addr.setState(IpAddress.State.Allocated);
- _ipAddressDao.update(addr.getId(), addr);
- // Save usage event
- if (owner.getAccountId() !=
Account.ACCOUNT_ID_SYSTEM) {
- VlanVO vlan =
_vlanDao.findById(addr.getVlanId());
- String guestType =
vlan.getVlanType().toString();
- if (!isIpDedicated(addr)) {
-
UsageEventUtils.publishUsageEvent(EventTypes.EVENT_NET_IP_ASSIGN,
owner.getId(), addr.getDataCenterId(), addr.getId(),
- addr.getAddress().toString(),
- addr.isSourceNat(), guestType,
addr.getSystem(), addr.getClass().getName(), addr.getUuid());
- }
- if (updateIpResourceCount(addr)) {
-
_resourceLimitMgr.incrementResourceCount(owner.getId(), ResourceType.public_ip);
+ if (_ipAddressDao.update(addr.getId(), addr)) {
+ // Save usage event
+ if (owner.getAccountId() !=
Account.ACCOUNT_ID_SYSTEM) {
+ VlanVO vlan =
_vlanDao.findById(addr.getVlanId());
+ String guestType =
vlan.getVlanType().toString();
+ if (!isIpDedicated(addr)) {
+
UsageEventUtils.publishUsageEvent(EventTypes.EVENT_NET_IP_ASSIGN,
owner.getId(), addr.getDataCenterId(), addr.getId(),
+ addr.getAddress().toString(),
+ addr.isSourceNat(), guestType,
addr.getSystem(), addr.getClass().getName(), addr.getUuid());
+ }
+ if (updateIpResourceCount(addr)) {
+
_resourceLimitMgr.incrementResourceCount(owner.getId(), ResourceType.public_ip);
+ }
}
}
}
}
}
- }
- });
+ });
+ }
+ }
+
+ @DB
+ private void markPublicIpAsAllocating(final IPAddressVO addr) {
+ synchronized (_allocatingLock) {
+ Transaction.execute(new TransactionCallbackNoReturn() {
+ @Override
+ public void doInTransactionWithoutResult(TransactionStatus
status) {
+
+ if (_ipAddressDao.lockRow(addr.getId(), true) != null) {
+ addr.setState(IpAddress.State.Allocating);
+ _ipAddressDao.update(addr.getId(), addr);
+ }
+ }
+ });
+ }
}
private boolean isIpDedicated(IPAddressVO addr) {
@@ -901,40 +916,28 @@ public class IpAddressManagerImpl extends ManagerBase
implements IpAddressManage
PublicIp ip = null;
try {
- ip = Transaction.execute(new
TransactionCallbackWithException<PublicIp,
InsufficientAddressCapacityException>() {
- @Override
- public PublicIp doInTransaction(TransactionStatus status)
throws InsufficientAddressCapacityException {
- Account owner = _accountDao.acquireInLockTable(ownerId);
-
- if (owner == null) {
- // this ownerId comes from owner or type Account. See
the class "AccountVO" and the annotations in that class
- // to get the table name and field name that is
queried to fill this ownerid.
- ConcurrentOperationException ex = new
ConcurrentOperationException("Unable to lock account");
- throw ex;
- }
- if (s_logger.isDebugEnabled()) {
- s_logger.debug("lock account " + ownerId + " is
acquired");
- }
- boolean displayIp = true;
- if (guestNtwkId != null) {
- Network ntwk = _networksDao.findById(guestNtwkId);
- displayIp = ntwk.getDisplayNetwork();
- } else if (vpcId != null) {
- VpcVO vpc = _vpcDao.findById(vpcId);
- displayIp = vpc.isDisplay();
- }
+ Account ownerAccount = _accountDao.acquireInLockTable(ownerId);
- PublicIp ip = fetchNewPublicIp(dcId, null, null, owner,
VlanType.VirtualNetwork, guestNtwkId, isSourceNat, false, null, false, vpcId,
displayIp);
- IPAddressVO publicIp = ip.ip();
-
- markPublicIpAsAllocated(publicIp);
- _ipAddressDao.update(publicIp.getId(), publicIp);
+ if (ownerAccount == null) {
+ // this ownerId comes from owner or type Account. See the
class "AccountVO" and the annotations in that class
+ // to get the table name and field name that is queried to
fill this ownerid.
+ ConcurrentOperationException ex = new
ConcurrentOperationException("Unable to lock account");
+ throw ex;
+ }
+ if (s_logger.isDebugEnabled()) {
+ s_logger.debug("lock account " + ownerId + " is acquired");
+ }
+ boolean displayIp = true;
+ if (guestNtwkId != null) {
+ Network ntwk = _networksDao.findById(guestNtwkId);
+ displayIp = ntwk.getDisplayNetwork();
+ } else if (vpcId != null) {
+ VpcVO vpc = _vpcDao.findById(vpcId);
+ displayIp = vpc.isDisplay();
+ }
- return ip;
- }
- });
+ return fetchNewPublicIp(dcId, null, null, owner,
VlanType.VirtualNetwork, guestNtwkId, isSourceNat, false, null, false, vpcId,
displayIp);
- return ip;
} finally {
if (owner != null) {
if (s_logger.isDebugEnabled()) {
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