POST - Read Timeout error

I have been getting this exception all too often lately, and I am not sure if the root cause is due to the site under test being a HTTPS, or is it due to other 'caching' reasons.

At some points, the scripts continue to execute even after this exception, but most of the time, it just freezes and then after the timeout period testComplete[, ] is executed.

Line of script that causes this exception is -

"
...
$sel->click_ok("btnAddToCart");
$sel->wait_for_page_to_load_ok("10000");
$sel->click_ok("finishButton");
$sel->wait_for_page_to_load_ok("10000");
$sel->select_window_ok();
$sel->click_ok("document.caPurchasingAssistantWizardForm.submitbutton[1]");
$sel->wait_for_page_to_load_ok("10000");
$sel->click_ok("//input[\@value='Apply Discount...']");
...
"



###########################3
12:56:16.333 INFO - Command request: click[submitbutton, ] on session 589192
12:56:16.958 INFO - Got result: OK on session 589192
12:56:17.020 INFO - Command request: waitForPageToLoad[15000, ] on session 589192
12:56:29.765 WARN - POST https://mytestsiteURL.com:443/selenium-server/driver/?seleniu
mWindowName=choiceWindow&counterToMakeURsUniqueAndSoStopPageCachingInTheBrowser=1204307778707&sessio
nId=589192&localFrameAddress=top&sequenceNumber=1&closing=true&uniqueId=sel%5F16463 HTTP/1.0
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at com.sun.net.ssl.internal.ssl.InputRecord.readFully(Unknown Source)
at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(Unknown Source)
at com.sun.net.ssl.internal.ssl.AppInputStream.read(Unknown Source)
at org.mortbay.util.LineInput.fill(LineInput.java:477)
at org.mortbay.util.LineInput.read(LineInput.java:352)
at java.io.FilterInputStream.read(Unknown Source)
at org.mortbay.http.HttpInputStream.read(HttpInputStream.java:120)
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at sun.nio.cs.StreamDecoder.read0(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at java.io.InputStreamReader.read(Unknown Source)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.readPostedData(SeleniumDriverRes
ourceHandler.java:251)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handleBrowserResponse(SeleniumDr
iverResourceHandler.java:169)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handle(SeleniumDriverResourceHan
dler.java:125)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
at org.mortbay.http.HttpServer.service(HttpServer.java:909)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:982)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)


12:59:17.008 INFO - Command request: selectWindow[, ] on session 589192
12:59:17.554 WARN - GET /selenium-server/driver/?cmd=waitForPageToLoad&1=15000&sessionId=589192 HTTP
/1.1
java.lang.RuntimeException: unexpected browser error from getTitle: ERROR: got a null result
at org.openqa.selenium.server.FrameGroupCommandQueueSet.getRemoteWindowTitle(FrameGroupComma
ndQueueSet.java:439)
at org.openqa.selenium.server.FrameGroupCommandQueueSet.matchesFrameAddress(FrameGroupComman
dQueueSet.java:548)
at org.openqa.selenium.server.FrameGroupCommandQueueSet.findMatchingFrameAddress(FrameGroupC
ommandQueueSet.java:511)
at org.openqa.selenium.server.FrameGroupCommandQueueSet.waitForLoad(FrameGroupCommandQueueSe
t.java:482)
at org.openqa.selenium.server.FrameGroupCommandQueueSet.waitForLoad(FrameGroupCommandQueueSe
t.java:450)
at org.openqa.selenium.server.FrameGroupCommandQueueSet.waitForLoad(FrameGroupCommandQueueSe
t.java:465)
at org.openqa.selenium.server.FrameGroupCommandQueueSet.doCommand(FrameGroupCommandQueueSet.
java:292)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.doCommand(SeleniumDriverResource
Handler.java:478)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handleCommandRequest(SeleniumDri
verResourceHandler.java:375)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handle(SeleniumDriverResourceHan
dler.java:123)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
at org.mortbay.http.HttpServer.service(HttpServer.java:909)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:982)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)


-V